diff --git a/clock b/clock
index 3c21a160..acd8c558 100755
--- a/clock
+++ b/clock
@@ -112,8 +112,8 @@ translations = {{}}
             data["days"] = {}
             for fmt, names in days.items():
                 data["days"][fmt] = {}
-                for value, name in names.items():
-                    data["days"][fmt][(value + 1) % 7] = name
+                for value, name in sorted(names.items()):
+                    data["days"][fmt][value] = name
 
             # Getting months names
             months = content["months"]["format"]
@@ -158,6 +158,9 @@ translations = {{}}
             # Day periods
             data["day_periods"] = content["day_periods"]["format"]["wide"]
 
+            # Week data
+            data["week_data"] = content["week_data"]
+
             result = self.TEMPLATE.format(
                 locale=locale,
                 plural=plural,
@@ -238,7 +241,7 @@ class LocaleRecreate(Command):
         locales = glob.glob(os.path.join(locales_dir, "*", "locale.py"))
         locales = [os.path.basename(os.path.dirname(locale)) for locale in locales]
 
-        self.call("locale:create", [("locales", locales)])
+        self.call("locale create", "locales " + " ".join(locales))
 
 
 class WindowsTzDump(Command):
diff --git a/pendulum/__init__.py b/pendulum/__init__.py
index 9c019c0f..76763ce9 100644
--- a/pendulum/__init__.py
+++ b/pendulum/__init__.py
@@ -8,24 +8,18 @@
 
 from pendulum.__version__ import __version__
 from pendulum.constants import DAYS_PER_WEEK
-from pendulum.constants import FRIDAY
 from pendulum.constants import HOURS_PER_DAY
 from pendulum.constants import MINUTES_PER_HOUR
-from pendulum.constants import MONDAY
 from pendulum.constants import MONTHS_PER_YEAR
-from pendulum.constants import SATURDAY
 from pendulum.constants import SECONDS_PER_DAY
 from pendulum.constants import SECONDS_PER_HOUR
 from pendulum.constants import SECONDS_PER_MINUTE
-from pendulum.constants import SUNDAY
-from pendulum.constants import THURSDAY
-from pendulum.constants import TUESDAY
-from pendulum.constants import WEDNESDAY
 from pendulum.constants import WEEKS_PER_YEAR
 from pendulum.constants import YEARS_PER_CENTURY
 from pendulum.constants import YEARS_PER_DECADE
 from pendulum.date import Date
 from pendulum.datetime import DateTime
+from pendulum.day import WeekDay
 from pendulum.duration import Duration
 from pendulum.formatting import Formatter
 from pendulum.helpers import format_diff
@@ -48,10 +42,19 @@
 from pendulum.tz.timezone import Timezone
 
 
+MONDAY = WeekDay.MONDAY
+TUESDAY = WeekDay.TUESDAY
+WEDNESDAY = WeekDay.WEDNESDAY
+THURSDAY = WeekDay.THURSDAY
+FRIDAY = WeekDay.FRIDAY
+SATURDAY = WeekDay.SATURDAY
+SUNDAY = WeekDay.SUNDAY
+
+
 _TEST_NOW: DateTime | None = None
 _LOCALE = "en"
-_WEEK_STARTS_AT = MONDAY
-_WEEK_ENDS_AT = SUNDAY
+_WEEK_STARTS_AT: WeekDay = WeekDay.MONDAY
+_WEEK_ENDS_AT: WeekDay = WeekDay.SUNDAY
 
 _formatter = Formatter()
 
@@ -335,19 +338,12 @@ def interval(start: DateTime, end: DateTime, absolute: bool = False) -> Interval
 __all__ = [
     "__version__",
     "DAYS_PER_WEEK",
-    "FRIDAY",
     "HOURS_PER_DAY",
     "MINUTES_PER_HOUR",
-    "MONDAY",
     "MONTHS_PER_YEAR",
-    "SATURDAY",
     "SECONDS_PER_DAY",
     "SECONDS_PER_HOUR",
     "SECONDS_PER_MINUTE",
-    "SUNDAY",
-    "THURSDAY",
-    "TUESDAY",
-    "WEDNESDAY",
     "WEEKS_PER_YEAR",
     "YEARS_PER_CENTURY",
     "YEARS_PER_DECADE",
@@ -355,6 +351,7 @@ def interval(start: DateTime, end: DateTime, absolute: bool = False) -> Interval
     "DateTime",
     "Duration",
     "Formatter",
+    "WeekDay",
     "date",
     "datetime",
     "duration",
diff --git a/pendulum/constants.py b/pendulum/constants.py
index c7b3876a..51eb0590 100644
--- a/pendulum/constants.py
+++ b/pendulum/constants.py
@@ -2,14 +2,6 @@
 from __future__ import annotations
 
 
-SUNDAY = 0
-MONDAY = 1
-TUESDAY = 2
-WEDNESDAY = 3
-THURSDAY = 4
-FRIDAY = 5
-SATURDAY = 6
-
 # Number of X in Y.
 YEARS_PER_CENTURY = 100
 YEARS_PER_DECADE = 10
diff --git a/pendulum/date.py b/pendulum/date.py
index 41d80e77..772f1ac1 100644
--- a/pendulum/date.py
+++ b/pendulum/date.py
@@ -16,16 +16,10 @@
 
 import pendulum
 
-from pendulum.constants import FRIDAY
-from pendulum.constants import MONDAY
 from pendulum.constants import MONTHS_PER_YEAR
-from pendulum.constants import SATURDAY
-from pendulum.constants import SUNDAY
-from pendulum.constants import THURSDAY
-from pendulum.constants import TUESDAY
-from pendulum.constants import WEDNESDAY
 from pendulum.constants import YEARS_PER_CENTURY
 from pendulum.constants import YEARS_PER_DECADE
+from pendulum.day import WeekDay
 from pendulum.exceptions import PendulumException
 from pendulum.helpers import add_duration
 from pendulum.interval import Interval
@@ -38,17 +32,6 @@
 
 
 class Date(FormattableMixin, date):
-    # Names of days of the week
-    _days: ClassVar[dict[int, str]] = {
-        SUNDAY: "Sunday",
-        MONDAY: "Monday",
-        TUESDAY: "Tuesday",
-        WEDNESDAY: "Wednesday",
-        THURSDAY: "Thursday",
-        FRIDAY: "Friday",
-        SATURDAY: "Saturday",
-    }
-
     _MODIFIERS_VALID_UNITS: ClassVar[list[str]] = [
         "day",
         "week",
@@ -66,11 +49,11 @@ def set(
         return self.replace(year=year, month=month, day=day)
 
     @property
-    def day_of_week(self) -> int:
+    def day_of_week(self) -> WeekDay:
         """
         Returns the day of the week (0-6).
         """
-        return self.isoweekday() % 7
+        return WeekDay(self.weekday())
 
     @property
     def day_of_year(self) -> int:
@@ -479,7 +462,7 @@ def _end_of_week(self) -> Self:
 
         return dt.end_of("day")
 
-    def next(self, day_of_week: int | None = None) -> Self:
+    def next(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the next occurrence of a given day of the week.
         If no day_of_week is provided, modify to the next occurrence
@@ -491,7 +474,7 @@ def next(self, day_of_week: int | None = None) -> Self:
         if day_of_week is None:
             day_of_week = self.day_of_week
 
-        if day_of_week < SUNDAY or day_of_week > SATURDAY:
+        if day_of_week < WeekDay.MONDAY or day_of_week > WeekDay.SUNDAY:
             raise ValueError("Invalid day of week")
 
         dt = self.add(days=1)
@@ -500,7 +483,7 @@ def next(self, day_of_week: int | None = None) -> Self:
 
         return dt
 
-    def previous(self, day_of_week: int | None = None) -> Self:
+    def previous(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the previous occurrence of a given day of the week.
         If no day_of_week is provided, modify to the previous occurrence
@@ -512,7 +495,7 @@ def previous(self, day_of_week: int | None = None) -> Self:
         if day_of_week is None:
             day_of_week = self.day_of_week
 
-        if day_of_week < SUNDAY or day_of_week > SATURDAY:
+        if day_of_week < WeekDay.MONDAY or day_of_week > WeekDay.SUNDAY:
             raise ValueError("Invalid day of week")
 
         dt = self.subtract(days=1)
@@ -521,7 +504,7 @@ def previous(self, day_of_week: int | None = None) -> Self:
 
         return dt
 
-    def first_of(self, unit: str, day_of_week: int | None = None) -> Self:
+    def first_of(self, unit: str, day_of_week: WeekDay | None = None) -> Self:
         """
         Returns an instance set to the first occurrence
         of a given day of the week in the current unit.
@@ -539,7 +522,7 @@ def first_of(self, unit: str, day_of_week: int | None = None) -> Self:
 
         return cast("Self", getattr(self, f"_first_of_{unit}")(day_of_week))
 
-    def last_of(self, unit: str, day_of_week: int | None = None) -> Self:
+    def last_of(self, unit: str, day_of_week: WeekDay | None = None) -> Self:
         """
         Returns an instance set to the last occurrence
         of a given day of the week in the current unit.
@@ -557,7 +540,7 @@ def last_of(self, unit: str, day_of_week: int | None = None) -> Self:
 
         return cast("Self", getattr(self, f"_last_of_{unit}")(day_of_week))
 
-    def nth_of(self, unit: str, nth: int, day_of_week: int) -> Self:
+    def nth_of(self, unit: str, nth: int, day_of_week: WeekDay) -> Self:
         """
         Returns a new instance set to the given occurrence
         of a given day of the week in the current unit.
@@ -578,12 +561,12 @@ def nth_of(self, unit: str, nth: int, day_of_week: int) -> Self:
         if not dt:
             raise PendulumException(
                 f"Unable to find occurence {nth}"
-                f" of {self._days[day_of_week]} in {unit}"
+                f" of {WeekDay(day_of_week).name.capitalize()} in {unit}"
             )
 
         return dt
 
-    def _first_of_month(self, day_of_week: int) -> Self:
+    def _first_of_month(self, day_of_week: WeekDay) -> Self:
         """
         Modify to the first occurrence of a given day of the week
         in the current month. If no day_of_week is provided,
@@ -599,7 +582,7 @@ def _first_of_month(self, day_of_week: int) -> Self:
 
         month = calendar.monthcalendar(dt.year, dt.month)
 
-        calendar_day = (day_of_week - 1) % 7
+        calendar_day = day_of_week
 
         if month[0][calendar_day] > 0:
             day_of_month = month[0][calendar_day]
@@ -608,7 +591,7 @@ def _first_of_month(self, day_of_week: int) -> Self:
 
         return dt.set(day=day_of_month)
 
-    def _last_of_month(self, day_of_week: int | None = None) -> Self:
+    def _last_of_month(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the last occurrence of a given day of the week
         in the current month. If no day_of_week is provided,
@@ -624,7 +607,7 @@ def _last_of_month(self, day_of_week: int | None = None) -> Self:
 
         month = calendar.monthcalendar(dt.year, dt.month)
 
-        calendar_day = (day_of_week - 1) % 7
+        calendar_day = day_of_week
 
         if month[-1][calendar_day] > 0:
             day_of_month = month[-1][calendar_day]
@@ -633,7 +616,7 @@ def _last_of_month(self, day_of_week: int | None = None) -> Self:
 
         return dt.set(day=day_of_month)
 
-    def _nth_of_month(self, nth: int, day_of_week: int) -> Self | None:
+    def _nth_of_month(self, nth: int, day_of_week: WeekDay) -> Self | None:
         """
         Modify to the given occurrence of a given day of the week
         in the current month. If the calculated occurrence is outside,
@@ -654,7 +637,7 @@ def _nth_of_month(self, nth: int, day_of_week: int) -> Self | None:
 
         return None
 
-    def _first_of_quarter(self, day_of_week: int | None = None) -> Self:
+    def _first_of_quarter(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the first occurrence of a given day of the week
         in the current quarter. If no day_of_week is provided,
@@ -665,7 +648,7 @@ def _first_of_quarter(self, day_of_week: int | None = None) -> Self:
             "month", day_of_week
         )
 
-    def _last_of_quarter(self, day_of_week: int | None = None) -> Self:
+    def _last_of_quarter(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the last occurrence of a given day of the week
         in the current quarter. If no day_of_week is provided,
@@ -674,7 +657,7 @@ def _last_of_quarter(self, day_of_week: int | None = None) -> Self:
         """
         return self.set(self.year, self.quarter * 3, 1).last_of("month", day_of_week)
 
-    def _nth_of_quarter(self, nth: int, day_of_week: int) -> Self | None:
+    def _nth_of_quarter(self, nth: int, day_of_week: WeekDay) -> Self | None:
         """
         Modify to the given occurrence of a given day of the week
         in the current quarter. If the calculated occurrence is outside,
@@ -697,7 +680,7 @@ def _nth_of_quarter(self, nth: int, day_of_week: int) -> Self | None:
 
         return self.set(self.year, dt.month, dt.day)
 
-    def _first_of_year(self, day_of_week: int | None = None) -> Self:
+    def _first_of_year(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the first occurrence of a given day of the week
         in the current year. If no day_of_week is provided,
@@ -706,7 +689,7 @@ def _first_of_year(self, day_of_week: int | None = None) -> Self:
         """
         return self.set(month=1).first_of("month", day_of_week)
 
-    def _last_of_year(self, day_of_week: int | None = None) -> Self:
+    def _last_of_year(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the last occurrence of a given day of the week
         in the current year. If no day_of_week is provided,
@@ -715,7 +698,7 @@ def _last_of_year(self, day_of_week: int | None = None) -> Self:
         """
         return self.set(month=MONTHS_PER_YEAR).last_of("month", day_of_week)
 
-    def _nth_of_year(self, nth: int, day_of_week: int) -> Self | None:
+    def _nth_of_year(self, nth: int, day_of_week: WeekDay) -> Self | None:
         """
         Modify to the given occurrence of a given day of the week
         in the current year. If the calculated occurrence is outside,
diff --git a/pendulum/datetime.py b/pendulum/datetime.py
index d036d255..5f369100 100644
--- a/pendulum/datetime.py
+++ b/pendulum/datetime.py
@@ -25,14 +25,13 @@
 from pendulum.constants import RFC1123
 from pendulum.constants import RFC2822
 from pendulum.constants import RSS
-from pendulum.constants import SATURDAY
 from pendulum.constants import SECONDS_PER_DAY
 from pendulum.constants import SECONDS_PER_MINUTE
-from pendulum.constants import SUNDAY
 from pendulum.constants import W3C
 from pendulum.constants import YEARS_PER_CENTURY
 from pendulum.constants import YEARS_PER_DECADE
 from pendulum.date import Date
+from pendulum.day import WeekDay
 from pendulum.exceptions import PendulumException
 from pendulum.helpers import add_duration
 from pendulum.interval import Interval
@@ -902,7 +901,7 @@ def _end_of_week(self) -> Self:
 
         return dt.end_of("day")
 
-    def next(self, day_of_week: int | None = None, keep_time: bool = False) -> Self:
+    def next(self, day_of_week: WeekDay | None = None, keep_time: bool = False) -> Self:
         """
         Modify to the next occurrence of a given day of the week.
         If no day_of_week is provided, modify to the next occurrence
@@ -912,7 +911,7 @@ def next(self, day_of_week: int | None = None, keep_time: bool = False) -> Self:
         if day_of_week is None:
             day_of_week = self.day_of_week
 
-        if day_of_week < SUNDAY or day_of_week > SATURDAY:
+        if day_of_week < WeekDay.MONDAY or day_of_week > WeekDay.SUNDAY:
             raise ValueError("Invalid day of week")
 
         dt = self if keep_time else self.start_of("day")
@@ -923,7 +922,9 @@ def next(self, day_of_week: int | None = None, keep_time: bool = False) -> Self:
 
         return dt
 
-    def previous(self, day_of_week: int | None = None, keep_time: bool = False) -> Self:
+    def previous(
+        self, day_of_week: WeekDay | None = None, keep_time: bool = False
+    ) -> Self:
         """
         Modify to the previous occurrence of a given day of the week.
         If no day_of_week is provided, modify to the previous occurrence
@@ -933,7 +934,7 @@ def previous(self, day_of_week: int | None = None, keep_time: bool = False) -> S
         if day_of_week is None:
             day_of_week = self.day_of_week
 
-        if day_of_week < SUNDAY or day_of_week > SATURDAY:
+        if day_of_week < WeekDay.MONDAY or day_of_week > WeekDay.SUNDAY:
             raise ValueError("Invalid day of week")
 
         dt = self if keep_time else self.start_of("day")
@@ -944,7 +945,7 @@ def previous(self, day_of_week: int | None = None, keep_time: bool = False) -> S
 
         return dt
 
-    def first_of(self, unit: str, day_of_week: int | None = None) -> Self:
+    def first_of(self, unit: str, day_of_week: WeekDay | None = None) -> Self:
         """
         Returns an instance set to the first occurrence
         of a given day of the week in the current unit.
@@ -959,7 +960,7 @@ def first_of(self, unit: str, day_of_week: int | None = None) -> Self:
 
         return cast("Self", getattr(self, f"_first_of_{unit}")(day_of_week))
 
-    def last_of(self, unit: str, day_of_week: int | None = None) -> Self:
+    def last_of(self, unit: str, day_of_week: WeekDay | None = None) -> Self:
         """
         Returns an instance set to the last occurrence
         of a given day of the week in the current unit.
@@ -974,7 +975,7 @@ def last_of(self, unit: str, day_of_week: int | None = None) -> Self:
 
         return cast("Self", getattr(self, f"_last_of_{unit}")(day_of_week))
 
-    def nth_of(self, unit: str, nth: int, day_of_week: int) -> Self:
+    def nth_of(self, unit: str, nth: int, day_of_week: WeekDay) -> Self:
         """
         Returns a new instance set to the given occurrence
         of a given day of the week in the current unit.
@@ -991,12 +992,12 @@ def nth_of(self, unit: str, nth: int, day_of_week: int) -> Self:
         if not dt:
             raise PendulumException(
                 f"Unable to find occurence {nth}"
-                f" of {self._days[day_of_week]} in {unit}"
+                f" of {WeekDay(day_of_week).name.capitalize()} in {unit}"
             )
 
         return dt
 
-    def _first_of_month(self, day_of_week: int | None = None) -> Self:
+    def _first_of_month(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the first occurrence of a given day of the week
         in the current month. If no day_of_week is provided,
@@ -1010,7 +1011,7 @@ def _first_of_month(self, day_of_week: int | None = None) -> Self:
 
         month = calendar.monthcalendar(dt.year, dt.month)
 
-        calendar_day = (day_of_week - 1) % 7
+        calendar_day = day_of_week
 
         if month[0][calendar_day] > 0:
             day_of_month = month[0][calendar_day]
@@ -1019,7 +1020,7 @@ def _first_of_month(self, day_of_week: int | None = None) -> Self:
 
         return dt.set(day=day_of_month)
 
-    def _last_of_month(self, day_of_week: int | None = None) -> Self:
+    def _last_of_month(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the last occurrence of a given day of the week
         in the current month. If no day_of_week is provided,
@@ -1033,7 +1034,7 @@ def _last_of_month(self, day_of_week: int | None = None) -> Self:
 
         month = calendar.monthcalendar(dt.year, dt.month)
 
-        calendar_day = (day_of_week - 1) % 7
+        calendar_day = day_of_week
 
         if month[-1][calendar_day] > 0:
             day_of_month = month[-1][calendar_day]
@@ -1042,7 +1043,9 @@ def _last_of_month(self, day_of_week: int | None = None) -> Self:
 
         return dt.set(day=day_of_month)
 
-    def _nth_of_month(self, nth: int, day_of_week: int | None = None) -> Self | None:
+    def _nth_of_month(
+        self, nth: int, day_of_week: WeekDay | None = None
+    ) -> Self | None:
         """
         Modify to the given occurrence of a given day of the week
         in the current month. If the calculated occurrence is outside,
@@ -1063,7 +1066,7 @@ def _nth_of_month(self, nth: int, day_of_week: int | None = None) -> Self | None
 
         return None
 
-    def _first_of_quarter(self, day_of_week: int | None = None) -> Self:
+    def _first_of_quarter(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the first occurrence of a given day of the week
         in the current quarter. If no day_of_week is provided,
@@ -1074,7 +1077,7 @@ def _first_of_quarter(self, day_of_week: int | None = None) -> Self:
             "month", day_of_week
         )
 
-    def _last_of_quarter(self, day_of_week: int | None = None) -> Self:
+    def _last_of_quarter(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the last occurrence of a given day of the week
         in the current quarter. If no day_of_week is provided,
@@ -1083,7 +1086,9 @@ def _last_of_quarter(self, day_of_week: int | None = None) -> Self:
         """
         return self.on(self.year, self.quarter * 3, 1).last_of("month", day_of_week)
 
-    def _nth_of_quarter(self, nth: int, day_of_week: int | None = None) -> Self | None:
+    def _nth_of_quarter(
+        self, nth: int, day_of_week: WeekDay | None = None
+    ) -> Self | None:
         """
         Modify to the given occurrence of a given day of the week
         in the current quarter. If the calculated occurrence is outside,
@@ -1106,7 +1111,7 @@ def _nth_of_quarter(self, nth: int, day_of_week: int | None = None) -> Self | No
 
         return self.on(self.year, dt.month, dt.day).start_of("day")
 
-    def _first_of_year(self, day_of_week: int | None = None) -> Self:
+    def _first_of_year(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the first occurrence of a given day of the week
         in the current year. If no day_of_week is provided,
@@ -1115,7 +1120,7 @@ def _first_of_year(self, day_of_week: int | None = None) -> Self:
         """
         return self.set(month=1).first_of("month", day_of_week)
 
-    def _last_of_year(self, day_of_week: int | None = None) -> Self:
+    def _last_of_year(self, day_of_week: WeekDay | None = None) -> Self:
         """
         Modify to the last occurrence of a given day of the week
         in the current year. If no day_of_week is provided,
@@ -1124,7 +1129,7 @@ def _last_of_year(self, day_of_week: int | None = None) -> Self:
         """
         return self.set(month=MONTHS_PER_YEAR).last_of("month", day_of_week)
 
-    def _nth_of_year(self, nth: int, day_of_week: int | None = None) -> Self | None:
+    def _nth_of_year(self, nth: int, day_of_week: WeekDay | None = None) -> Self | None:
         """
         Modify to the given occurrence of a given day of the week
         in the current year. If the calculated occurrence is outside,
diff --git a/pendulum/day.py b/pendulum/day.py
new file mode 100644
index 00000000..7bfffca1
--- /dev/null
+++ b/pendulum/day.py
@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+from enum import IntEnum
+
+
+class WeekDay(IntEnum):
+    MONDAY = 0
+    TUESDAY = 1
+    WEDNESDAY = 2
+    THURSDAY = 3
+    FRIDAY = 4
+    SATURDAY = 5
+    SUNDAY = 6
diff --git a/pendulum/formatting/formatter.py b/pendulum/formatting/formatter.py
index d8d13f65..ee04063f 100644
--- a/pendulum/formatting/formatter.py
+++ b/pendulum/formatting/formatter.py
@@ -49,7 +49,7 @@ class Formatter:
         r"\[([^\[]*)\]|\\(.)|"
         "("
         "Mo|MM?M?M?"
-        "|Do|DDDo|DD?D?D?|ddd?d?|do?"
+        "|Do|DDDo|DD?D?D?|ddd?d?|do?|eo?"
         "|E{1,4}"
         "|w[o|w]?|W[o|W]?|Qo?"
         "|YYYY|YY|Y"
@@ -82,6 +82,8 @@ class Formatter:
         "ddd": "days.abbreviated",
         "dd": "days.short",
         "do": None,
+        "e": None,
+        "eo": None,
         "Wo": None,
         "wo": None,
         "A": lambda locale: (
@@ -111,7 +113,7 @@ class Formatter:
         "DDDD": lambda dt: f"{dt.day_of_year:03d}",
         "DDD": lambda dt: f"{dt.day_of_year:d}",
         # Day of Week
-        "d": lambda dt: f"{dt.day_of_week:d}",
+        "d": lambda dt: f"{(dt.day_of_week + 1) % 7:d}",
         # Day of ISO Week
         "E": lambda dt: f"{dt.isoweekday():d}",
         # Hour
@@ -176,6 +178,7 @@ class Formatter:
         "ddd": _MATCH_WORD,
         "dd": _MATCH_WORD,
         "d": _MATCH_1,
+        "e": _MATCH_1,
         "E": _MATCH_1,
         "Do": None,
         "H": _MATCH_1_TO_2,
@@ -214,8 +217,8 @@ class Formatter:
         "dddd": lambda weekday: weekday,
         "ddd": lambda weekday: weekday,
         "dd": lambda weekday: weekday,
-        "d": lambda weekday: int(weekday) % 7,
-        "E": lambda weekday: int(weekday),
+        "d": lambda weekday: int(weekday),
+        "E": lambda weekday: int(weekday) - 1,
         "HH": lambda hour: int(hour),
         "H": lambda hour: int(hour),
         "hh": lambda hour: int(hour),
@@ -318,14 +321,19 @@ def _format_localizable_token(
             return cast(str, locale.get("translations.days.short")[dt.day_of_week])
         elif token == "ddd":
             return cast(
-                str, locale.get("translations.days.abbreviated")[dt.day_of_week]
+                str,
+                locale.get("translations.days.abbreviated")[dt.day_of_week],
             )
         elif token == "dddd":
             return cast(str, locale.get("translations.days.wide")[dt.day_of_week])
+        elif token == "e":
+            first_day = cast(int, locale.get("translations.week_data.first_day"))
+
+            return str((dt.day_of_week % 7 - first_day) % 7)
         elif token == "Do":
             return locale.ordinalize(dt.day)
         elif token == "do":
-            return locale.ordinalize(dt.day_of_week)
+            return locale.ordinalize((dt.day_of_week + 1) % 7)
         elif token == "Mo":
             return locale.ordinalize(dt.month)
         elif token == "Qo":
@@ -334,6 +342,10 @@ def _format_localizable_token(
             return locale.ordinalize(dt.week_of_year)
         elif token == "DDDo":
             return locale.ordinalize(dt.day_of_year)
+        elif token == "eo":
+            first_day = cast(int, locale.get("translations.week_data.first_day"))
+
+            return locale.ordinalize((dt.day_of_week % 7 - first_day) % 7 + 1)
         elif token == "A":
             key = "translations.day_periods"
             if dt.hour >= 12:
diff --git a/pendulum/helpers.py b/pendulum/helpers.py
index e9390ca9..87ed6871 100644
--- a/pendulum/helpers.py
+++ b/pendulum/helpers.py
@@ -14,6 +14,7 @@
 import pendulum
 
 from pendulum.constants import DAYS_PER_MONTHS
+from pendulum.day import WeekDay
 from pendulum.formatting.difference_formatter import DifferenceFormatter
 from pendulum.locales.locale import Locale
 
@@ -188,16 +189,16 @@ def get_locale() -> str:
     return pendulum._LOCALE
 
 
-def week_starts_at(wday: int) -> None:
-    if wday < pendulum.SUNDAY or wday > pendulum.SATURDAY:
-        raise ValueError("Invalid week day as start of week.")
+def week_starts_at(wday: WeekDay) -> None:
+    if wday < WeekDay.MONDAY or wday > WeekDay.SUNDAY:
+        raise ValueError("Invalid day of week")
 
     pendulum._WEEK_STARTS_AT = wday
 
 
-def week_ends_at(wday: int) -> None:
-    if wday < pendulum.SUNDAY or wday > pendulum.SATURDAY:
-        raise ValueError("Invalid week day as start of week.")
+def week_ends_at(wday: WeekDay) -> None:
+    if wday < WeekDay.MONDAY or wday > WeekDay.SUNDAY:
+        raise ValueError("Invalid day of week")
 
     pendulum._WEEK_ENDS_AT = wday
 
diff --git a/pendulum/locales/cs/locale.py b/pendulum/locales/cs/locale.py
index 2c51c786..d7b38bdf 100644
--- a/pendulum/locales/cs/locale.py
+++ b/pendulum/locales/cs/locale.py
@@ -20,40 +20,40 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "ne",
-                1: "po",
-                2: "út",
-                3: "st",
-                4: "čt",
-                5: "pá",
-                6: "so",
+                0: "po",
+                1: "út",
+                2: "st",
+                3: "čt",
+                4: "pá",
+                5: "so",
+                6: "ne",
             },
             "narrow": {
-                0: "N",
-                1: "P",
-                2: "Ú",
-                3: "S",
-                4: "Č",
-                5: "P",
-                6: "S",
+                0: "P",
+                1: "Ú",
+                2: "S",
+                3: "Č",
+                4: "P",
+                5: "S",
+                6: "N",
             },
             "short": {
-                0: "ne",
-                1: "po",
-                2: "út",
-                3: "st",
-                4: "čt",
-                5: "pá",
-                6: "so",
+                0: "po",
+                1: "út",
+                2: "st",
+                3: "čt",
+                4: "pá",
+                5: "so",
+                6: "ne",
             },
             "wide": {
-                0: "neděle",
-                1: "pondělí",
-                2: "úterý",
-                3: "středa",
-                4: "čtvrtek",
-                5: "pátek",
-                6: "sobota",
+                0: "pondělí",
+                1: "úterý",
+                2: "středa",
+                3: "čtvrtek",
+                4: "pátek",
+                5: "sobota",
+                6: "neděle",
             },
         },
         "months": {
@@ -261,6 +261,12 @@
             "evening1": "večer",
             "night1": "v noci",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/da/locale.py b/pendulum/locales/da/locale.py
index 936af3ab..968e1d6f 100644
--- a/pendulum/locales/da/locale.py
+++ b/pendulum/locales/da/locale.py
@@ -19,24 +19,24 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "søn.",
-                1: "man.",
-                2: "tir.",
-                3: "ons.",
-                4: "tor.",
-                5: "fre.",
-                6: "lør.",
+                0: "man.",
+                1: "tir.",
+                2: "ons.",
+                3: "tor.",
+                4: "fre.",
+                5: "lør.",
+                6: "søn.",
             },
-            "narrow": {0: "S", 1: "M", 2: "T", 3: "O", 4: "T", 5: "F", 6: "L"},
-            "short": {0: "sø", 1: "ma", 2: "ti", 3: "on", 4: "to", 5: "fr", 6: "lø"},
+            "narrow": {0: "M", 1: "T", 2: "O", 3: "T", 4: "F", 5: "L", 6: "S"},
+            "short": {0: "ma", 1: "ti", 2: "on", 3: "to", 4: "fr", 5: "lø", 6: "sø"},
             "wide": {
-                0: "søndag",
-                1: "mandag",
-                2: "tirsdag",
-                3: "onsdag",
-                4: "torsdag",
-                5: "fredag",
-                6: "lørdag",
+                0: "mandag",
+                1: "tirsdag",
+                2: "onsdag",
+                3: "torsdag",
+                4: "fredag",
+                5: "lørdag",
+                6: "søndag",
             },
         },
         "months": {
@@ -142,6 +142,12 @@
             "evening1": "om aftenen",
             "night1": "om natten",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/de/locale.py b/pendulum/locales/de/locale.py
index 94d2ff1a..28e631cc 100644
--- a/pendulum/locales/de/locale.py
+++ b/pendulum/locales/de/locale.py
@@ -16,32 +16,32 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "So.",
-                1: "Mo.",
-                2: "Di.",
-                3: "Mi.",
-                4: "Do.",
-                5: "Fr.",
-                6: "Sa.",
+                0: "Mo.",
+                1: "Di.",
+                2: "Mi.",
+                3: "Do.",
+                4: "Fr.",
+                5: "Sa.",
+                6: "So.",
             },
-            "narrow": {0: "S", 1: "M", 2: "D", 3: "M", 4: "D", 5: "F", 6: "S"},
+            "narrow": {0: "M", 1: "D", 2: "M", 3: "D", 4: "F", 5: "S", 6: "S"},
             "short": {
-                0: "So.",
-                1: "Mo.",
-                2: "Di.",
-                3: "Mi.",
-                4: "Do.",
-                5: "Fr.",
-                6: "Sa.",
+                0: "Mo.",
+                1: "Di.",
+                2: "Mi.",
+                3: "Do.",
+                4: "Fr.",
+                5: "Sa.",
+                6: "So.",
             },
             "wide": {
-                0: "Sonntag",
-                1: "Montag",
-                2: "Dienstag",
-                3: "Mittwoch",
-                4: "Donnerstag",
-                5: "Freitag",
-                6: "Samstag",
+                0: "Montag",
+                1: "Dienstag",
+                2: "Mittwoch",
+                3: "Donnerstag",
+                4: "Freitag",
+                5: "Samstag",
+                6: "Sonntag",
             },
         },
         "months": {
@@ -139,6 +139,12 @@
             "evening1": "abends",
             "night1": "nachts",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/en/locale.py b/pendulum/locales/en/locale.py
index 00eafc2f..08b0b85e 100644
--- a/pendulum/locales/en/locale.py
+++ b/pendulum/locales/en/locale.py
@@ -31,24 +31,24 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "Sun",
-                1: "Mon",
-                2: "Tue",
-                3: "Wed",
-                4: "Thu",
-                5: "Fri",
-                6: "Sat",
+                0: "Mon",
+                1: "Tue",
+                2: "Wed",
+                3: "Thu",
+                4: "Fri",
+                5: "Sat",
+                6: "Sun",
             },
-            "narrow": {0: "S", 1: "M", 2: "T", 3: "W", 4: "T", 5: "F", 6: "S"},
-            "short": {0: "Su", 1: "Mo", 2: "Tu", 3: "We", 4: "Th", 5: "Fr", 6: "Sa"},
+            "narrow": {0: "M", 1: "T", 2: "W", 3: "T", 4: "F", 5: "S", 6: "S"},
+            "short": {0: "Mo", 1: "Tu", 2: "We", 3: "Th", 4: "Fr", 5: "Sa", 6: "Su"},
             "wide": {
-                0: "Sunday",
-                1: "Monday",
-                2: "Tuesday",
-                3: "Wednesday",
-                4: "Thursday",
-                5: "Friday",
-                6: "Saturday",
+                0: "Monday",
+                1: "Tuesday",
+                2: "Wednesday",
+                3: "Thursday",
+                4: "Friday",
+                5: "Saturday",
+                6: "Sunday",
             },
         },
         "months": {
@@ -145,6 +145,12 @@
             "evening1": "in the evening",
             "night1": "at night",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 6,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/en_gb/__init__.py b/pendulum/locales/en_gb/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/pendulum/locales/en_gb/custom.py b/pendulum/locales/en_gb/custom.py
new file mode 100644
index 00000000..f6f6353f
--- /dev/null
+++ b/pendulum/locales/en_gb/custom.py
@@ -0,0 +1,23 @@
+"""
+en-gb custom locale file.
+"""
+
+translations = {
+    "units": {"few_second": "a few seconds"},
+    # Relative time
+    "ago": "{} ago",
+    "from_now": "in {}",
+    "after": "{0} after",
+    "before": "{0} before",
+    # Ordinals
+    "ordinal": {"one": "st", "two": "nd", "few": "rd", "other": "th"},
+    # Date formats
+    "date_formats": {
+        "LTS": "HH:mm:ss",
+        "LT": "HH:mm",
+        "L": "DD/MM/YYYY",
+        "LL": "D MMMM YYYY",
+        "LLL": "D MMMM YYYY HH:mm",
+        "LLLL": "dddd, D MMMM YYYY HH:mm",
+    },
+}
diff --git a/pendulum/locales/en_gb/locale.py b/pendulum/locales/en_gb/locale.py
new file mode 100644
index 00000000..7ff8ad64
--- /dev/null
+++ b/pendulum/locales/en_gb/locale.py
@@ -0,0 +1,238 @@
+from .custom import translations as custom_translations
+
+
+"""
+en-gb locale file.
+
+It has been generated automatically and must not be modified directly.
+"""
+
+
+locale = {
+    "plural": lambda n: "one"
+    if ((n == n and ((n == 1))) and (0 == 0 and ((0 == 0))))
+    else "other",
+    "ordinal": lambda n: "few"
+    if (
+        ((n % 10) == (n % 10) and (((n % 10) == 3)))
+        and (not ((n % 100) == (n % 100) and (((n % 100) == 13))))
+    )
+    else "one"
+    if (
+        ((n % 10) == (n % 10) and (((n % 10) == 1)))
+        and (not ((n % 100) == (n % 100) and (((n % 100) == 11))))
+    )
+    else "two"
+    if (
+        ((n % 10) == (n % 10) and (((n % 10) == 2)))
+        and (not ((n % 100) == (n % 100) and (((n % 100) == 12))))
+    )
+    else "other",
+    "translations": {
+        "days": {
+            "abbreviated": {
+                0: "Mon",
+                1: "Tue",
+                2: "Wed",
+                3: "Thu",
+                4: "Fri",
+                5: "Sat",
+                6: "Sun",
+            },
+            "narrow": {
+                0: "M",
+                1: "T",
+                2: "W",
+                3: "T",
+                4: "F",
+                5: "S",
+                6: "S",
+            },
+            "short": {
+                0: "Mo",
+                1: "Tu",
+                2: "We",
+                3: "Th",
+                4: "Fr",
+                5: "Sa",
+                6: "Su",
+            },
+            "wide": {
+                0: "Monday",
+                1: "Tuesday",
+                2: "Wednesday",
+                3: "Thursday",
+                4: "Friday",
+                5: "Saturday",
+                6: "Sunday",
+            },
+        },
+        "months": {
+            "abbreviated": {
+                1: "Jan",
+                2: "Feb",
+                3: "Mar",
+                4: "Apr",
+                5: "May",
+                6: "Jun",
+                7: "Jul",
+                8: "Aug",
+                9: "Sept",
+                10: "Oct",
+                11: "Nov",
+                12: "Dec",
+            },
+            "narrow": {
+                1: "J",
+                2: "F",
+                3: "M",
+                4: "A",
+                5: "M",
+                6: "J",
+                7: "J",
+                8: "A",
+                9: "S",
+                10: "O",
+                11: "N",
+                12: "D",
+            },
+            "wide": {
+                1: "January",
+                2: "February",
+                3: "March",
+                4: "April",
+                5: "May",
+                6: "June",
+                7: "July",
+                8: "August",
+                9: "September",
+                10: "October",
+                11: "November",
+                12: "December",
+            },
+        },
+        "units": {
+            "year": {
+                "one": "{0} year",
+                "other": "{0} years",
+            },
+            "month": {
+                "one": "{0} month",
+                "other": "{0} months",
+            },
+            "week": {
+                "one": "{0} week",
+                "other": "{0} weeks",
+            },
+            "day": {
+                "one": "{0} day",
+                "other": "{0} days",
+            },
+            "hour": {
+                "one": "{0} hour",
+                "other": "{0} hours",
+            },
+            "minute": {
+                "one": "{0} minute",
+                "other": "{0} minutes",
+            },
+            "second": {
+                "one": "{0} second",
+                "other": "{0} seconds",
+            },
+            "microsecond": {
+                "one": "{0} microsecond",
+                "other": "{0} microseconds",
+            },
+        },
+        "relative": {
+            "year": {
+                "future": {
+                    "other": "in {0} years",
+                    "one": "in {0} year",
+                },
+                "past": {
+                    "other": "{0} years ago",
+                    "one": "{0} year ago",
+                },
+            },
+            "month": {
+                "future": {
+                    "other": "in {0} months",
+                    "one": "in {0} month",
+                },
+                "past": {
+                    "other": "{0} months ago",
+                    "one": "{0} month ago",
+                },
+            },
+            "week": {
+                "future": {
+                    "other": "in {0} weeks",
+                    "one": "in {0} week",
+                },
+                "past": {
+                    "other": "{0} weeks ago",
+                    "one": "{0} week ago",
+                },
+            },
+            "day": {
+                "future": {
+                    "other": "in {0} days",
+                    "one": "in {0} day",
+                },
+                "past": {
+                    "other": "{0} days ago",
+                    "one": "{0} day ago",
+                },
+            },
+            "hour": {
+                "future": {
+                    "other": "in {0} hours",
+                    "one": "in {0} hour",
+                },
+                "past": {
+                    "other": "{0} hours ago",
+                    "one": "{0} hour ago",
+                },
+            },
+            "minute": {
+                "future": {
+                    "other": "in {0} minutes",
+                    "one": "in {0} minute",
+                },
+                "past": {
+                    "other": "{0} minutes ago",
+                    "one": "{0} minute ago",
+                },
+            },
+            "second": {
+                "future": {
+                    "other": "in {0} seconds",
+                    "one": "in {0} second",
+                },
+                "past": {
+                    "other": "{0} seconds ago",
+                    "one": "{0} second ago",
+                },
+            },
+        },
+        "day_periods": {
+            "midnight": "midnight",
+            "am": "am",
+            "noon": "noon",
+            "pm": "pm",
+            "morning1": "in the morning",
+            "afternoon1": "in the afternoon",
+            "evening1": "in the evening",
+            "night1": "at night",
+        },
+        "week_data": {
+            "min_days": 4,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
+    },
+    "custom": custom_translations,
+}
diff --git a/pendulum/locales/en_us/__init__.py b/pendulum/locales/en_us/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/pendulum/locales/en_us/custom.py b/pendulum/locales/en_us/custom.py
new file mode 100644
index 00000000..943d8f8b
--- /dev/null
+++ b/pendulum/locales/en_us/custom.py
@@ -0,0 +1,23 @@
+"""
+en-us custom locale file.
+"""
+
+translations = {
+    "units": {"few_second": "a few seconds"},
+    # Relative time
+    "ago": "{} ago",
+    "from_now": "in {}",
+    "after": "{0} after",
+    "before": "{0} before",
+    # Ordinals
+    "ordinal": {"one": "st", "two": "nd", "few": "rd", "other": "th"},
+    # Date formats
+    "date_formats": {
+        "LTS": "h:mm:ss A",
+        "LT": "h:mm A",
+        "L": "MM/DD/YYYY",
+        "LL": "MMMM D, YYYY",
+        "LLL": "MMMM D, YYYY h:mm A",
+        "LLLL": "dddd, MMMM D, YYYY h:mm A",
+    },
+}
diff --git a/pendulum/locales/en_us/locale.py b/pendulum/locales/en_us/locale.py
new file mode 100644
index 00000000..657c76f6
--- /dev/null
+++ b/pendulum/locales/en_us/locale.py
@@ -0,0 +1,238 @@
+from .custom import translations as custom_translations
+
+
+"""
+en-us locale file.
+
+It has been generated automatically and must not be modified directly.
+"""
+
+
+locale = {
+    "plural": lambda n: "one"
+    if ((n == n and ((n == 1))) and (0 == 0 and ((0 == 0))))
+    else "other",
+    "ordinal": lambda n: "few"
+    if (
+        ((n % 10) == (n % 10) and (((n % 10) == 3)))
+        and (not ((n % 100) == (n % 100) and (((n % 100) == 13))))
+    )
+    else "one"
+    if (
+        ((n % 10) == (n % 10) and (((n % 10) == 1)))
+        and (not ((n % 100) == (n % 100) and (((n % 100) == 11))))
+    )
+    else "two"
+    if (
+        ((n % 10) == (n % 10) and (((n % 10) == 2)))
+        and (not ((n % 100) == (n % 100) and (((n % 100) == 12))))
+    )
+    else "other",
+    "translations": {
+        "days": {
+            "abbreviated": {
+                0: "Mon",
+                1: "Tue",
+                2: "Wed",
+                3: "Thu",
+                4: "Fri",
+                5: "Sat",
+                6: "Sun",
+            },
+            "narrow": {
+                0: "M",
+                1: "T",
+                2: "W",
+                3: "T",
+                4: "F",
+                5: "S",
+                6: "S",
+            },
+            "short": {
+                0: "Mo",
+                1: "Tu",
+                2: "We",
+                3: "Th",
+                4: "Fr",
+                5: "Sa",
+                6: "Su",
+            },
+            "wide": {
+                0: "Monday",
+                1: "Tuesday",
+                2: "Wednesday",
+                3: "Thursday",
+                4: "Friday",
+                5: "Saturday",
+                6: "Sunday",
+            },
+        },
+        "months": {
+            "abbreviated": {
+                1: "Jan",
+                2: "Feb",
+                3: "Mar",
+                4: "Apr",
+                5: "May",
+                6: "Jun",
+                7: "Jul",
+                8: "Aug",
+                9: "Sep",
+                10: "Oct",
+                11: "Nov",
+                12: "Dec",
+            },
+            "narrow": {
+                1: "J",
+                2: "F",
+                3: "M",
+                4: "A",
+                5: "M",
+                6: "J",
+                7: "J",
+                8: "A",
+                9: "S",
+                10: "O",
+                11: "N",
+                12: "D",
+            },
+            "wide": {
+                1: "January",
+                2: "February",
+                3: "March",
+                4: "April",
+                5: "May",
+                6: "June",
+                7: "July",
+                8: "August",
+                9: "September",
+                10: "October",
+                11: "November",
+                12: "December",
+            },
+        },
+        "units": {
+            "year": {
+                "one": "{0} year",
+                "other": "{0} years",
+            },
+            "month": {
+                "one": "{0} month",
+                "other": "{0} months",
+            },
+            "week": {
+                "one": "{0} week",
+                "other": "{0} weeks",
+            },
+            "day": {
+                "one": "{0} day",
+                "other": "{0} days",
+            },
+            "hour": {
+                "one": "{0} hour",
+                "other": "{0} hours",
+            },
+            "minute": {
+                "one": "{0} minute",
+                "other": "{0} minutes",
+            },
+            "second": {
+                "one": "{0} second",
+                "other": "{0} seconds",
+            },
+            "microsecond": {
+                "one": "{0} microsecond",
+                "other": "{0} microseconds",
+            },
+        },
+        "relative": {
+            "year": {
+                "future": {
+                    "other": "in {0} years",
+                    "one": "in {0} year",
+                },
+                "past": {
+                    "other": "{0} years ago",
+                    "one": "{0} year ago",
+                },
+            },
+            "month": {
+                "future": {
+                    "other": "in {0} months",
+                    "one": "in {0} month",
+                },
+                "past": {
+                    "other": "{0} months ago",
+                    "one": "{0} month ago",
+                },
+            },
+            "week": {
+                "future": {
+                    "other": "in {0} weeks",
+                    "one": "in {0} week",
+                },
+                "past": {
+                    "other": "{0} weeks ago",
+                    "one": "{0} week ago",
+                },
+            },
+            "day": {
+                "future": {
+                    "other": "in {0} days",
+                    "one": "in {0} day",
+                },
+                "past": {
+                    "other": "{0} days ago",
+                    "one": "{0} day ago",
+                },
+            },
+            "hour": {
+                "future": {
+                    "other": "in {0} hours",
+                    "one": "in {0} hour",
+                },
+                "past": {
+                    "other": "{0} hours ago",
+                    "one": "{0} hour ago",
+                },
+            },
+            "minute": {
+                "future": {
+                    "other": "in {0} minutes",
+                    "one": "in {0} minute",
+                },
+                "past": {
+                    "other": "{0} minutes ago",
+                    "one": "{0} minute ago",
+                },
+            },
+            "second": {
+                "future": {
+                    "other": "in {0} seconds",
+                    "one": "in {0} second",
+                },
+                "past": {
+                    "other": "{0} seconds ago",
+                    "one": "{0} second ago",
+                },
+            },
+        },
+        "day_periods": {
+            "midnight": "midnight",
+            "am": "AM",
+            "noon": "noon",
+            "pm": "PM",
+            "morning1": "in the morning",
+            "afternoon1": "in the afternoon",
+            "evening1": "in the evening",
+            "night1": "at night",
+        },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 6,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
+    },
+    "custom": custom_translations,
+}
diff --git a/pendulum/locales/es/locale.py b/pendulum/locales/es/locale.py
index edba4d38..09fa1441 100644
--- a/pendulum/locales/es/locale.py
+++ b/pendulum/locales/es/locale.py
@@ -14,24 +14,24 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "dom.",
-                1: "lun.",
-                2: "mar.",
-                3: "mié.",
-                4: "jue.",
-                5: "vie.",
-                6: "sáb.",
+                0: "lun.",
+                1: "mar.",
+                2: "mié.",
+                3: "jue.",
+                4: "vie.",
+                5: "sáb.",
+                6: "dom.",
             },
-            "narrow": {0: "D", 1: "L", 2: "M", 3: "X", 4: "J", 5: "V", 6: "S"},
-            "short": {0: "DO", 1: "LU", 2: "MA", 3: "MI", 4: "JU", 5: "VI", 6: "SA"},
+            "narrow": {0: "L", 1: "M", 2: "X", 3: "J", 4: "V", 5: "S", 6: "D"},
+            "short": {0: "LU", 1: "MA", 2: "MI", 3: "JU", 4: "VI", 5: "SA", 6: "DO"},
             "wide": {
-                0: "domingo",
-                1: "lunes",
-                2: "martes",
-                3: "miércoles",
-                4: "jueves",
-                5: "viernes",
-                6: "sábado",
+                0: "lunes",
+                1: "martes",
+                2: "miércoles",
+                3: "jueves",
+                4: "viernes",
+                5: "sábado",
+                6: "domingo",
             },
         },
         "months": {
@@ -136,6 +136,12 @@
             "evening1": "de la tarde",
             "night1": "de la noche",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/fa/locale.py b/pendulum/locales/fa/locale.py
index 32f8e5f3..43aff228 100644
--- a/pendulum/locales/fa/locale.py
+++ b/pendulum/locales/fa/locale.py
@@ -16,24 +16,24 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "یکشنبه",
-                1: "دوشنبه",
-                2: "سه\u200cشنبه",
-                3: "چهارشنبه",
-                4: "پنجشنبه",
-                5: "جمعه",
-                6: "شنبه",
+                0: "دوشنبه",
+                1: "سه\u200cشنبه",
+                2: "چهارشنبه",
+                3: "پنجشنبه",
+                4: "جمعه",
+                5: "شنبه",
+                6: "یکشنبه",
             },
-            "narrow": {0: "ی", 1: "د", 2: "س", 3: "چ", 4: "پ", 5: "ج", 6: "ش"},
-            "short": {0: "۱ش", 1: "۲ش", 2: "۳ش", 3: "۴ش", 4: "۵ش", 5: "ج", 6: "ش"},
+            "narrow": {0: "د", 1: "س", 2: "چ", 3: "پ", 4: "ج", 5: "ش", 6: "ی"},
+            "short": {0: "۲ش", 1: "۳ش", 2: "۴ش", 3: "۵ش", 4: "ج", 5: "ش", 6: "۱ش"},
             "wide": {
-                0: "یکشنبه",
-                1: "دوشنبه",
-                2: "سه\u200cشنبه",
-                3: "چهارشنبه",
-                4: "پنجشنبه",
-                5: "جمعه",
-                6: "شنبه",
+                0: "دوشنبه",
+                1: "سه\u200cشنبه",
+                2: "چهارشنبه",
+                3: "پنجشنبه",
+                4: "جمعه",
+                5: "شنبه",
+                6: "یکشنبه",
             },
         },
         "months": {
@@ -130,6 +130,12 @@
             "evening1": "عصر",
             "night1": "شب",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/fo/locale.py b/pendulum/locales/fo/locale.py
index 10319eaa..a13792a7 100644
--- a/pendulum/locales/fo/locale.py
+++ b/pendulum/locales/fo/locale.py
@@ -14,32 +14,32 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "sun.",
-                1: "mán.",
-                2: "týs.",
-                3: "mik.",
-                4: "hós.",
-                5: "frí.",
-                6: "ley.",
+                0: "mán.",
+                1: "týs.",
+                2: "mik.",
+                3: "hós.",
+                4: "frí.",
+                5: "ley.",
+                6: "sun.",
             },
-            "narrow": {0: "S", 1: "M", 2: "T", 3: "M", 4: "H", 5: "F", 6: "L"},
+            "narrow": {0: "M", 1: "T", 2: "M", 3: "H", 4: "F", 5: "L", 6: "S"},
             "short": {
-                0: "su.",
-                1: "má.",
-                2: "tý.",
-                3: "mi.",
-                4: "hó.",
-                5: "fr.",
-                6: "le.",
+                0: "má.",
+                1: "tý.",
+                2: "mi.",
+                3: "hó.",
+                4: "fr.",
+                5: "le.",
+                6: "su.",
             },
             "wide": {
-                0: "sunnudagur",
-                1: "mánadagur",
-                2: "týsdagur",
-                3: "mikudagur",
-                4: "hósdagur",
-                5: "fríggjadagur",
-                6: "leygardagur",
+                0: "mánadagur",
+                1: "týsdagur",
+                2: "mikudagur",
+                3: "hósdagur",
+                4: "fríggjadagur",
+                5: "leygardagur",
+                6: "sunnudagur",
             },
         },
         "months": {
@@ -127,6 +127,12 @@
             },
         },
         "day_periods": {"am": "AM", "pm": "PM"},
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/fr/locale.py b/pendulum/locales/fr/locale.py
index 8855d53c..241ae987 100644
--- a/pendulum/locales/fr/locale.py
+++ b/pendulum/locales/fr/locale.py
@@ -14,24 +14,24 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "dim.",
-                1: "lun.",
-                2: "mar.",
-                3: "mer.",
-                4: "jeu.",
-                5: "ven.",
-                6: "sam.",
+                0: "lun.",
+                1: "mar.",
+                2: "mer.",
+                3: "jeu.",
+                4: "ven.",
+                5: "sam.",
+                6: "dim.",
             },
-            "narrow": {0: "D", 1: "L", 2: "M", 3: "M", 4: "J", 5: "V", 6: "S"},
-            "short": {0: "di", 1: "lu", 2: "ma", 3: "me", 4: "je", 5: "ve", 6: "sa"},
+            "narrow": {0: "L", 1: "M", 2: "M", 3: "J", 4: "V", 5: "S", 6: "D"},
+            "short": {0: "lu", 1: "ma", 2: "me", 3: "je", 4: "ve", 5: "sa", 6: "di"},
             "wide": {
-                0: "dimanche",
-                1: "lundi",
-                2: "mardi",
-                3: "mercredi",
-                4: "jeudi",
-                5: "vendredi",
-                6: "samedi",
+                0: "lundi",
+                1: "mardi",
+                2: "mercredi",
+                3: "jeudi",
+                4: "vendredi",
+                5: "samedi",
+                6: "dimanche",
             },
         },
         "months": {
@@ -128,6 +128,12 @@
             "evening1": "du soir",
             "night1": "de nuit",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/he/locale.py b/pendulum/locales/he/locale.py
index 457c1019..9e8a8e00 100644
--- a/pendulum/locales/he/locale.py
+++ b/pendulum/locales/he/locale.py
@@ -23,40 +23,40 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "יום א׳",
-                1: "יום ב׳",
-                2: "יום ג׳",
-                3: "יום ד׳",
-                4: "יום ה׳",
-                5: "יום ו׳",
-                6: "שבת",
+                0: "יום ב׳",
+                1: "יום ג׳",
+                2: "יום ד׳",
+                3: "יום ה׳",
+                4: "יום ו׳",
+                5: "שבת",
+                6: "יום א׳",
             },
             "narrow": {
-                0: "א׳",
-                1: "ב׳",
-                2: "ג׳",
-                3: "ד׳",
-                4: "ה׳",
-                5: "ו׳",
-                6: "ש׳",
+                0: "ב׳",
+                1: "ג׳",
+                2: "ד׳",
+                3: "ה׳",
+                4: "ו׳",
+                5: "ש׳",
+                6: "א׳",
             },
             "short": {
-                0: "א׳",
-                1: "ב׳",
-                2: "ג׳",
-                3: "ד׳",
-                4: "ה׳",
-                5: "ו׳",
-                6: "ש׳",
+                0: "ב׳",
+                1: "ג׳",
+                2: "ד׳",
+                3: "ה׳",
+                4: "ו׳",
+                5: "ש׳",
+                6: "א׳",
             },
             "wide": {
-                0: "יום ראשון",
-                1: "יום שני",
-                2: "יום שלישי",
-                3: "יום רביעי",
-                4: "יום חמישי",
-                5: "יום שישי",
-                6: "יום שבת",
+                0: "יום שני",
+                1: "יום שלישי",
+                2: "יום רביעי",
+                3: "יום חמישי",
+                4: "יום שישי",
+                5: "יום שבת",
+                6: "יום ראשון",
             },
         },
         "months": {
@@ -264,6 +264,12 @@
             "night1": "בלילה",
             "night2": "לפנות בוקר",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/id/locale.py b/pendulum/locales/id/locale.py
index bc994ce4..fff8a934 100644
--- a/pendulum/locales/id/locale.py
+++ b/pendulum/locales/id/locale.py
@@ -14,32 +14,32 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "Min",
-                1: "Sen",
-                2: "Sel",
-                3: "Rab",
-                4: "Kam",
-                5: "Jum",
-                6: "Sab",
+                0: "Sen",
+                1: "Sel",
+                2: "Rab",
+                3: "Kam",
+                4: "Jum",
+                5: "Sab",
+                6: "Min",
             },
-            "narrow": {0: "M", 1: "S", 2: "S", 3: "R", 4: "K", 5: "J", 6: "S"},
+            "narrow": {0: "S", 1: "S", 2: "R", 3: "K", 4: "J", 5: "S", 6: "M"},
             "short": {
-                0: "Min",
-                1: "Sen",
-                2: "Sel",
-                3: "Rab",
-                4: "Kam",
-                5: "Jum",
-                6: "Sab",
+                0: "Sen",
+                1: "Sel",
+                2: "Rab",
+                3: "Kam",
+                4: "Jum",
+                5: "Sab",
+                6: "Min",
             },
             "wide": {
-                0: "Minggu",
-                1: "Senin",
-                2: "Selasa",
-                3: "Rabu",
-                4: "Kamis",
-                5: "Jumat",
-                6: "Sabtu",
+                0: "Senin",
+                1: "Selasa",
+                2: "Rabu",
+                3: "Kamis",
+                4: "Jumat",
+                5: "Sabtu",
+                6: "Minggu",
             },
         },
         "months": {
@@ -136,6 +136,12 @@
             "evening1": "sore",
             "night1": "malam",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/it/locale.py b/pendulum/locales/it/locale.py
index bb3fdcf6..f2ebbfd2 100644
--- a/pendulum/locales/it/locale.py
+++ b/pendulum/locales/it/locale.py
@@ -18,32 +18,32 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "dom",
-                1: "lun",
-                2: "mar",
-                3: "mer",
-                4: "gio",
-                5: "ven",
-                6: "sab",
+                0: "lun",
+                1: "mar",
+                2: "mer",
+                3: "gio",
+                4: "ven",
+                5: "sab",
+                6: "dom",
             },
-            "narrow": {0: "D", 1: "L", 2: "M", 3: "M", 4: "G", 5: "V", 6: "S"},
+            "narrow": {0: "L", 1: "M", 2: "M", 3: "G", 4: "V", 5: "S", 6: "D"},
             "short": {
-                0: "dom",
-                1: "lun",
-                2: "mar",
-                3: "mer",
-                4: "gio",
-                5: "ven",
-                6: "sab",
+                0: "lun",
+                1: "mar",
+                2: "mer",
+                3: "gio",
+                4: "ven",
+                5: "sab",
+                6: "dom",
             },
             "wide": {
-                0: "domenica",
-                1: "lunedì",
-                2: "martedì",
-                3: "mercoledì",
-                4: "giovedì",
-                5: "venerdì",
-                6: "sabato",
+                0: "lunedì",
+                1: "martedì",
+                2: "mercoledì",
+                3: "giovedì",
+                4: "venerdì",
+                5: "sabato",
+                6: "domenica",
             },
         },
         "months": {
@@ -140,6 +140,12 @@
             "evening1": "di sera",
             "night1": "di notte",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/ja/locale.py b/pendulum/locales/ja/locale.py
index 574d2ec0..e6f5cfd4 100644
--- a/pendulum/locales/ja/locale.py
+++ b/pendulum/locales/ja/locale.py
@@ -14,40 +14,40 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "日",
-                1: "月",
-                2: "火",
-                3: "水",
-                4: "木",
-                5: "金",
-                6: "土",
+                0: "月",
+                1: "火",
+                2: "水",
+                3: "木",
+                4: "金",
+                5: "土",
+                6: "日",
             },
             "narrow": {
-                0: "日",
-                1: "月",
-                2: "火",
-                3: "水",
-                4: "木",
-                5: "金",
-                6: "土",
+                0: "月",
+                1: "火",
+                2: "水",
+                3: "木",
+                4: "金",
+                5: "土",
+                6: "日",
             },
             "short": {
-                0: "日",
-                1: "月",
-                2: "火",
-                3: "水",
-                4: "木",
-                5: "金",
-                6: "土",
+                0: "月",
+                1: "火",
+                2: "水",
+                3: "木",
+                4: "金",
+                5: "土",
+                6: "日",
             },
             "wide": {
-                0: "日曜日",
-                1: "月曜日",
-                2: "火曜日",
-                3: "水曜日",
-                4: "木曜日",
-                5: "金曜日",
-                6: "土曜日",
+                0: "月曜日",
+                1: "火曜日",
+                2: "水曜日",
+                3: "木曜日",
+                4: "金曜日",
+                5: "土曜日",
+                6: "日曜日",
             },
         },
         "months": {
@@ -189,6 +189,12 @@
             "night1": "夜",
             "night2": "夜中",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/ko/locale.py b/pendulum/locales/ko/locale.py
index 0f5a3462..8ca36eb9 100644
--- a/pendulum/locales/ko/locale.py
+++ b/pendulum/locales/ko/locale.py
@@ -13,17 +13,17 @@
     "ordinal": lambda n: "other",
     "translations": {
         "days": {
-            "abbreviated": {0: "일", 1: "월", 2: "화", 3: "수", 4: "목", 5: "금", 6: "토"},
-            "narrow": {0: "일", 1: "월", 2: "화", 3: "수", 4: "목", 5: "금", 6: "토"},
-            "short": {0: "일", 1: "월", 2: "화", 3: "수", 4: "목", 5: "금", 6: "토"},
+            "abbreviated": {0: "월", 1: "화", 2: "수", 3: "목", 4: "금", 5: "토", 6: "일"},
+            "narrow": {0: "월", 1: "화", 2: "수", 3: "목", 4: "금", 5: "토", 6: "일"},
+            "short": {0: "월", 1: "화", 2: "수", 3: "목", 4: "금", 5: "토", 6: "일"},
             "wide": {
-                0: "일요일",
-                1: "월요일",
-                2: "화요일",
-                3: "수요일",
-                4: "목요일",
-                5: "금요일",
-                6: "토요일",
+                0: "월요일",
+                1: "화요일",
+                2: "수요일",
+                3: "목요일",
+                4: "금요일",
+                5: "토요일",
+                6: "일요일",
             },
         },
         "months": {
@@ -100,6 +100,12 @@
             "evening1": "저녁",
             "night1": "밤",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/lt/locale.py b/pendulum/locales/lt/locale.py
index fb017efa..aeae21ec 100644
--- a/pendulum/locales/lt/locale.py
+++ b/pendulum/locales/lt/locale.py
@@ -26,24 +26,24 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "sk",
-                1: "pr",
-                2: "an",
-                3: "tr",
-                4: "kt",
-                5: "pn",
-                6: "št",
-            },
-            "narrow": {0: "S", 1: "P", 2: "A", 3: "T", 4: "K", 5: "P", 6: "Š"},
-            "short": {0: "Sk", 1: "Pr", 2: "An", 3: "Tr", 4: "Kt", 5: "Pn", 6: "Št"},
+                0: "pr",
+                1: "an",
+                2: "tr",
+                3: "kt",
+                4: "pn",
+                5: "št",
+                6: "sk",
+            },
+            "narrow": {0: "P", 1: "A", 2: "T", 3: "K", 4: "P", 5: "Š", 6: "S"},
+            "short": {0: "Pr", 1: "An", 2: "Tr", 3: "Kt", 4: "Pn", 5: "Št", 6: "Sk"},
             "wide": {
-                0: "sekmadienis",
-                1: "pirmadienis",
-                2: "antradienis",
-                3: "trečiadienis",
-                4: "ketvirtadienis",
-                5: "penktadienis",
-                6: "šeštadienis",
+                0: "pirmadienis",
+                1: "antradienis",
+                2: "trečiadienis",
+                3: "ketvirtadienis",
+                4: "penktadienis",
+                5: "šeštadienis",
+                6: "sekmadienis",
             },
         },
         "months": {
@@ -250,6 +250,12 @@
             "evening1": "vakaras",
             "night1": "naktis",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/nb/locale.py b/pendulum/locales/nb/locale.py
index c8297a86..efb03b52 100644
--- a/pendulum/locales/nb/locale.py
+++ b/pendulum/locales/nb/locale.py
@@ -14,32 +14,32 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "søn.",
-                1: "man.",
-                2: "tir.",
-                3: "ons.",
-                4: "tor.",
-                5: "fre.",
-                6: "lør.",
+                0: "man.",
+                1: "tir.",
+                2: "ons.",
+                3: "tor.",
+                4: "fre.",
+                5: "lør.",
+                6: "søn.",
             },
-            "narrow": {0: "S", 1: "M", 2: "T", 3: "O", 4: "T", 5: "F", 6: "L"},
+            "narrow": {0: "M", 1: "T", 2: "O", 3: "T", 4: "F", 5: "L", 6: "S"},
             "short": {
-                0: "sø.",
-                1: "ma.",
-                2: "ti.",
-                3: "on.",
-                4: "to.",
-                5: "fr.",
-                6: "lø.",
+                0: "ma.",
+                1: "ti.",
+                2: "on.",
+                3: "to.",
+                4: "fr.",
+                5: "lø.",
+                6: "sø.",
             },
             "wide": {
-                0: "søndag",
-                1: "mandag",
-                2: "tirsdag",
-                3: "onsdag",
-                4: "torsdag",
-                5: "fredag",
-                6: "lørdag",
+                0: "mandag",
+                1: "tirsdag",
+                2: "onsdag",
+                3: "torsdag",
+                4: "fredag",
+                5: "lørdag",
+                6: "søndag",
             },
         },
         "months": {
@@ -145,6 +145,12 @@
             "evening1": "kvelden",
             "night1": "natten",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/nl/locale.py b/pendulum/locales/nl/locale.py
index cb1570d7..e1f498d8 100644
--- a/pendulum/locales/nl/locale.py
+++ b/pendulum/locales/nl/locale.py
@@ -16,24 +16,24 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "zo",
-                1: "ma",
-                2: "di",
-                3: "wo",
-                4: "do",
-                5: "vr",
-                6: "za",
+                0: "ma",
+                1: "di",
+                2: "wo",
+                3: "do",
+                4: "vr",
+                5: "za",
+                6: "zo",
             },
-            "narrow": {0: "Z", 1: "M", 2: "D", 3: "W", 4: "D", 5: "V", 6: "Z"},
-            "short": {0: "zo", 1: "ma", 2: "di", 3: "wo", 4: "do", 5: "vr", 6: "za"},
+            "narrow": {0: "M", 1: "D", 2: "W", 3: "D", 4: "V", 5: "Z", 6: "Z"},
+            "short": {0: "ma", 1: "di", 2: "wo", 3: "do", 4: "vr", 5: "za", 6: "zo"},
             "wide": {
-                0: "zondag",
-                1: "maandag",
-                2: "dinsdag",
-                3: "woensdag",
-                4: "donderdag",
-                5: "vrijdag",
-                6: "zaterdag",
+                0: "maandag",
+                1: "dinsdag",
+                2: "woensdag",
+                3: "donderdag",
+                4: "vrijdag",
+                5: "zaterdag",
+                6: "zondag",
             },
         },
         "months": {
@@ -128,6 +128,12 @@
             "afternoon1": "‘s middags",
             "evening1": "‘s avonds",
             "night1": "‘s nachts",
+            "week_data": {
+                "min_days": 1,
+                "first_day": 0,
+                "weekend_start": 5,
+                "weekend_end": 6,
+            },
         },
     },
     "custom": custom_translations,
diff --git a/pendulum/locales/nn/locale.py b/pendulum/locales/nn/locale.py
index eb46e1de..d6565b13 100644
--- a/pendulum/locales/nn/locale.py
+++ b/pendulum/locales/nn/locale.py
@@ -14,32 +14,32 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "søn.",
-                1: "mån.",
-                2: "tys.",
-                3: "ons.",
-                4: "tor.",
-                5: "fre.",
-                6: "lau.",
+                0: "mån.",
+                1: "tys.",
+                2: "ons.",
+                3: "tor.",
+                4: "fre.",
+                5: "lau.",
+                6: "søn.",
             },
-            "narrow": {0: "S", 1: "M", 2: "T", 3: "O", 4: "T", 5: "F", 6: "L"},
+            "narrow": {0: "M", 1: "T", 2: "O", 3: "T", 4: "F", 5: "L", 6: "S"},
             "short": {
-                0: "sø.",
-                1: "må.",
-                2: "ty.",
-                3: "on.",
-                4: "to.",
-                5: "fr.",
-                6: "la.",
+                0: "må.",
+                1: "ty.",
+                2: "on.",
+                3: "to.",
+                4: "fr.",
+                5: "la.",
+                6: "sø.",
             },
             "wide": {
-                0: "søndag",
-                1: "måndag",
-                2: "tysdag",
-                3: "onsdag",
-                4: "torsdag",
-                5: "fredag",
-                6: "laurdag",
+                0: "måndag",
+                1: "tysdag",
+                2: "onsdag",
+                3: "torsdag",
+                4: "fredag",
+                5: "laurdag",
+                6: "søndag",
             },
         },
         "months": {
@@ -136,6 +136,12 @@
             },
         },
         "day_periods": {"am": "formiddag", "pm": "ettermiddag"},
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/pl/locale.py b/pendulum/locales/pl/locale.py
index bf6af102..0f1943e7 100644
--- a/pendulum/locales/pl/locale.py
+++ b/pendulum/locales/pl/locale.py
@@ -41,32 +41,32 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "niedz.",
-                1: "pon.",
-                2: "wt.",
-                3: "śr.",
-                4: "czw.",
-                5: "pt.",
-                6: "sob.",
+                0: "pon.",
+                1: "wt.",
+                2: "śr.",
+                3: "czw.",
+                4: "pt.",
+                5: "sob.",
+                6: "niedz.",
             },
-            "narrow": {0: "n", 1: "p", 2: "w", 3: "ś", 4: "c", 5: "p", 6: "s"},
+            "narrow": {0: "p", 1: "w", 2: "ś", 3: "c", 4: "p", 5: "s", 6: "n"},
             "short": {
-                0: "nie",
-                1: "pon",
-                2: "wto",
-                3: "śro",
-                4: "czw",
-                5: "pią",
-                6: "sob",
+                0: "pon",
+                1: "wto",
+                2: "śro",
+                3: "czw",
+                4: "pią",
+                5: "sob",
+                6: "nie",
             },
             "wide": {
-                0: "niedziela",
-                1: "poniedziałek",
-                2: "wtorek",
-                3: "środa",
-                4: "czwartek",
-                5: "piątek",
-                6: "sobota",
+                0: "poniedziałek",
+                1: "wtorek",
+                2: "środa",
+                3: "czwartek",
+                4: "piątek",
+                5: "sobota",
+                6: "niedziela",
             },
         },
         "months": {
@@ -274,6 +274,12 @@
             "evening1": "wieczorem",
             "night1": "w nocy",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/pt_br/locale.py b/pendulum/locales/pt_br/locale.py
index 742c41fe..4bd4feb8 100644
--- a/pendulum/locales/pt_br/locale.py
+++ b/pendulum/locales/pt_br/locale.py
@@ -16,32 +16,32 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "dom",
-                1: "seg",
-                2: "ter",
-                3: "qua",
-                4: "qui",
-                5: "sex",
-                6: "sáb",
+                0: "seg",
+                1: "ter",
+                2: "qua",
+                3: "qui",
+                4: "sex",
+                5: "sáb",
+                6: "dom",
             },
-            "narrow": {0: "D", 1: "S", 2: "T", 3: "Q", 4: "Q", 5: "S", 6: "S"},
+            "narrow": {0: "S", 1: "T", 2: "Q", 3: "Q", 4: "S", 5: "S", 6: "D"},
             "short": {
-                0: "dom",
-                1: "seg",
-                2: "ter",
-                3: "qua",
-                4: "qui",
-                5: "sex",
-                6: "sáb",
+                0: "seg",
+                1: "ter",
+                2: "qua",
+                3: "qui",
+                4: "sex",
+                5: "sáb",
+                6: "dom",
             },
             "wide": {
-                0: "domingo",
-                1: "segunda-feira",
-                2: "terça-feira",
-                3: "quarta-feira",
-                4: "quinta-feira",
-                5: "sexta-feira",
-                6: "sábado",
+                0: "segunda-feira",
+                1: "terça-feira",
+                2: "quarta-feira",
+                3: "quinta-feira",
+                4: "sexta-feira",
+                5: "sábado",
+                6: "domingo",
             },
         },
         "months": {
@@ -138,6 +138,12 @@
             "evening1": "da noite",
             "night1": "da madrugada",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 6,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/ru/locale.py b/pendulum/locales/ru/locale.py
index 3736e0b1..04154672 100644
--- a/pendulum/locales/ru/locale.py
+++ b/pendulum/locales/ru/locale.py
@@ -41,24 +41,24 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "вс",
-                1: "пн",
-                2: "вт",
-                3: "ср",
-                4: "чт",
-                5: "пт",
-                6: "сб",
+                0: "пн",
+                1: "вт",
+                2: "ср",
+                3: "чт",
+                4: "пт",
+                5: "сб",
+                6: "вс",
             },
-            "narrow": {0: "вс", 1: "пн", 2: "вт", 3: "ср", 4: "чт", 5: "пт", 6: "сб"},
-            "short": {0: "вс", 1: "пн", 2: "вт", 3: "ср", 4: "чт", 5: "пт", 6: "сб"},
+            "narrow": {0: "пн", 1: "вт", 2: "ср", 3: "чт", 4: "пт", 5: "сб", 6: "вс"},
+            "short": {0: "пн", 1: "вт", 2: "ср", 3: "чт", 4: "пт", 5: "сб", 6: "вс"},
             "wide": {
-                0: "воскресенье",
-                1: "понедельник",
-                2: "вторник",
-                3: "среда",
-                4: "четверг",
-                5: "пятница",
-                6: "суббота",
+                0: "понедельник",
+                1: "вторник",
+                2: "среда",
+                3: "четверг",
+                4: "пятница",
+                5: "суббота",
+                6: "воскресенье",
             },
         },
         "months": {
@@ -265,6 +265,12 @@
             "evening1": "вечера",
             "night1": "ночи",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/sk/locale.py b/pendulum/locales/sk/locale.py
index 8d3459ff..e3caee1d 100644
--- a/pendulum/locales/sk/locale.py
+++ b/pendulum/locales/sk/locale.py
@@ -20,40 +20,40 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "ne",
-                1: "po",
-                2: "ut",
-                3: "st",
-                4: "št",
-                5: "pi",
-                6: "so",
+                0: "po",
+                1: "ut",
+                2: "st",
+                3: "št",
+                4: "pi",
+                5: "so",
+                6: "ne",
             },
             "narrow": {
-                0: "n",
-                1: "p",
-                2: "u",
-                3: "s",
-                4: "š",
-                5: "p",
-                6: "s",
+                0: "p",
+                1: "u",
+                2: "s",
+                3: "š",
+                4: "p",
+                5: "s",
+                6: "n",
             },
             "short": {
-                0: "ne",
-                1: "po",
-                2: "ut",
-                3: "st",
-                4: "št",
-                5: "pi",
-                6: "so",
+                0: "po",
+                1: "ut",
+                2: "st",
+                3: "št",
+                4: "pi",
+                5: "so",
+                6: "ne",
             },
             "wide": {
-                0: "nedeľa",
-                1: "pondelok",
-                2: "utorok",
-                3: "streda",
-                4: "štvrtok",
-                5: "piatok",
-                6: "sobota",
+                0: "pondelok",
+                1: "utorok",
+                2: "streda",
+                3: "štvrtok",
+                4: "piatok",
+                5: "sobota",
+                6: "nedeľa",
             },
         },
         "months": {
@@ -261,6 +261,12 @@
             "evening1": "večer",
             "night1": "v noci",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/sv/locale.py b/pendulum/locales/sv/locale.py
index 5b74a6e1..457acf23 100644
--- a/pendulum/locales/sv/locale.py
+++ b/pendulum/locales/sv/locale.py
@@ -21,40 +21,40 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "sön",
-                1: "mån",
-                2: "tis",
-                3: "ons",
-                4: "tors",
-                5: "fre",
-                6: "lör",
+                0: "mån",
+                1: "tis",
+                2: "ons",
+                3: "tors",
+                4: "fre",
+                5: "lör",
+                6: "sön",
             },
             "narrow": {
-                0: "S",
-                1: "M",
-                2: "T",
-                3: "O",
-                4: "T",
-                5: "F",
-                6: "L",
+                0: "M",
+                1: "T",
+                2: "O",
+                3: "T",
+                4: "F",
+                5: "L",
+                6: "S",
             },
             "short": {
-                0: "sö",
-                1: "må",
-                2: "ti",
-                3: "on",
-                4: "to",
-                5: "fr",
-                6: "lö",
+                0: "må",
+                1: "ti",
+                2: "on",
+                3: "to",
+                4: "fr",
+                5: "lö",
+                6: "sö",
             },
             "wide": {
-                0: "söndag",
-                1: "måndag",
-                2: "tisdag",
-                3: "onsdag",
-                4: "torsdag",
-                5: "fredag",
-                6: "lördag",
+                0: "måndag",
+                1: "tisdag",
+                2: "onsdag",
+                3: "torsdag",
+                4: "fredag",
+                5: "lördag",
+                6: "söndag",
             },
         },
         "months": {
@@ -217,6 +217,12 @@
             "evening1": "på kvällen",
             "night1": "på natten",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/tr/locale.py b/pendulum/locales/tr/locale.py
index 1806df17..8b605345 100644
--- a/pendulum/locales/tr/locale.py
+++ b/pendulum/locales/tr/locale.py
@@ -14,40 +14,40 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "Paz",
-                1: "Pzt",
-                2: "Sal",
-                3: "Çar",
-                4: "Per",
-                5: "Cum",
-                6: "Cmt",
+                0: "Pzt",
+                1: "Sal",
+                2: "Çar",
+                3: "Per",
+                4: "Cum",
+                5: "Cmt",
+                6: "Paz",
             },
             "narrow": {
                 0: "P",
-                1: "P",
-                2: "S",
-                3: "Ç",
-                4: "P",
+                1: "S",
+                2: "Ç",
+                3: "P",
+                4: "C",
                 5: "C",
-                6: "C",
+                6: "P",
             },
             "short": {
-                0: "Pa",
-                1: "Pt",
-                2: "Sa",
-                3: "Ça",
-                4: "Pe",
-                5: "Cu",
-                6: "Ct",
+                0: "Pt",
+                1: "Sa",
+                2: "Ça",
+                3: "Pe",
+                4: "Cu",
+                5: "Ct",
+                6: "Pa",
             },
             "wide": {
-                0: "Pazar",
-                1: "Pazartesi",
-                2: "Salı",
-                3: "Çarşamba",
-                4: "Perşembe",
-                5: "Cuma",
-                6: "Cumartesi",
+                0: "Pazartesi",
+                1: "Salı",
+                2: "Çarşamba",
+                3: "Perşembe",
+                4: "Cuma",
+                5: "Cumartesi",
+                6: "Pazar",
             },
         },
         "months": {
@@ -212,6 +212,12 @@
             "evening1": "akşam",
             "night1": "gece",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/pendulum/locales/zh/locale.py b/pendulum/locales/zh/locale.py
index 2df477f9..30b353d3 100644
--- a/pendulum/locales/zh/locale.py
+++ b/pendulum/locales/zh/locale.py
@@ -14,24 +14,24 @@
     "translations": {
         "days": {
             "abbreviated": {
-                0: "周日",
-                1: "周一",
-                2: "周二",
-                3: "周三",
-                4: "周四",
-                5: "周五",
-                6: "周六",
+                0: "周一",
+                1: "周二",
+                2: "周三",
+                3: "周四",
+                4: "周五",
+                5: "周六",
+                6: "周日",
             },
-            "narrow": {0: "日", 1: "一", 2: "二", 3: "三", 4: "四", 5: "五", 6: "六"},
-            "short": {0: "周日", 1: "周一", 2: "周二", 3: "周三", 4: "周四", 5: "周五", 6: "周六"},
+            "narrow": {0: "一", 1: "二", 2: "三", 3: "四", 4: "五", 5: "六", 6: "日"},
+            "short": {0: "周一", 1: "周二", 2: "周三", 3: "周四", 4: "周五", 5: "周六", 6: "周日"},
             "wide": {
-                0: "星期日",
-                1: "星期一",
-                2: "星期二",
-                3: "星期三",
-                4: "星期四",
-                5: "星期五",
-                6: "星期六",
+                0: "星期一",
+                1: "星期二",
+                2: "星期三",
+                3: "星期四",
+                4: "星期五",
+                5: "星期六",
+                6: "星期日",
             },
         },
         "months": {
@@ -108,6 +108,12 @@
             "evening1": "晚上",
             "night1": "凌晨",
         },
+        "week_data": {
+            "min_days": 1,
+            "first_day": 0,
+            "weekend_start": 5,
+            "weekend_end": 6,
+        },
     },
     "custom": custom_translations,
 }
diff --git a/poetry.lock b/poetry.lock
index 4addbfb4..68f84bda 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1195,4 +1195,4 @@ testing = ["func-timeout", "jaraco.itertools", "pytest (>=6)", "pytest-black (>=
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.7"
-content-hash = "658e22a0828244e01d1639cbacfbaa84a6ad345aade89e5e28722fb39401db37"
+content-hash = "6110c4ae04517ea55be06ed75b9d4bbde83798bba6b365ac01a1b3919230c5b7"
diff --git a/pyproject.toml b/pyproject.toml
index f5c5e715..58f6547e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,6 +33,7 @@ python-dateutil = "^2.6"
 time-machine = { version = "^2.6.0", markers = "implementation_name != 'pypy'" }
 tzdata = ">=2020.1"
 importlib-resources = { version = "^5.9.0", python = ">=3.7,<3.9" }
+cleo = "^2.0.1"
 
 [tool.poetry.group.test.dependencies]
 pytest = "^7.1.2"
@@ -92,6 +93,7 @@ ignore = [
     "B904", # use 'raise ... from err'
     "B905", # use explicit 'strict=' parameter with 'zip()'
     "N818", #  Exception name should be named with an Error suffix
+    "RUF001",
 ]
 extend-exclude = [
     # External to the project's coding standards:
diff --git a/tests/conftest.py b/tests/conftest.py
index 8f0e6b93..99f4b93a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -19,8 +19,8 @@ def setup() -> Iterator[None]:
 
     pendulum.set_locale("en")
     pendulum.set_local_timezone()
-    pendulum.week_starts_at(pendulum.MONDAY)
-    pendulum.week_ends_at(pendulum.SUNDAY)
+    pendulum.week_starts_at(pendulum.WeekDay.MONDAY)
+    pendulum.week_ends_at(pendulum.WeekDay.SUNDAY)
 
 
 def assert_datetime(
diff --git a/tests/date/test_day_of_week_modifiers.py b/tests/date/test_day_of_week_modifiers.py
index 55aba551..03630967 100644
--- a/tests/date/test_day_of_week_modifiers.py
+++ b/tests/date/test_day_of_week_modifiers.py
@@ -49,7 +49,7 @@ def test_next_monday():
 
 
 def test_next_saturday():
-    d = pendulum.date(1975, 5, 21).next(6)
+    d = pendulum.date(1975, 5, 21).next(5)
     assert_date(d, 1975, 5, 24)
 
 
@@ -71,7 +71,7 @@ def test_previous_monday():
 
 
 def test_previous_saturday():
-    d = pendulum.date(1975, 5, 21).previous(6)
+    d = pendulum.date(1975, 5, 21).previous(5)
     assert_date(d, 1975, 5, 17)
 
 
@@ -93,7 +93,7 @@ def test_first_wednesday_of_month():
 
 
 def test_first_friday_of_month():
-    d = pendulum.date(1975, 11, 21).first_of("month", 5)
+    d = pendulum.date(1975, 11, 21).first_of("month", 4)
     assert_date(d, 1975, 11, 7)
 
 
@@ -108,7 +108,7 @@ def test_last_tuesday_of_month():
 
 
 def test_last_friday_of_month():
-    d = pendulum.date(1975, 12, 5).last_of("month", 5)
+    d = pendulum.date(1975, 12, 5).last_of("month", 4)
     assert_date(d, 1975, 12, 26)
 
 
@@ -139,7 +139,7 @@ def test_2nd_monday_of_month():
 
 
 def test_3rd_wednesday_of_month():
-    d = pendulum.date(1975, 12, 5).nth_of("month", 3, 3)
+    d = pendulum.date(1975, 12, 5).nth_of("month", 3, 2)
 
     assert_date(d, 1975, 12, 17)
 
@@ -155,7 +155,7 @@ def test_first_wednesday_of_quarter():
 
 
 def test_first_friday_of_quarter():
-    d = pendulum.date(1975, 11, 21).first_of("quarter", 5)
+    d = pendulum.date(1975, 11, 21).first_of("quarter", 4)
     assert_date(d, 1975, 10, 3)
 
 
@@ -215,7 +215,7 @@ def test_2nd_monday_of_quarter():
 
 
 def test_3rd_wednesday_of_quarter():
-    d = pendulum.date(1975, 8, 5).nth_of("quarter", 3, 3)
+    d = pendulum.date(1975, 8, 5).nth_of("quarter", 3, 2)
     assert_date(d, 1975, 7, 16)
 
 
@@ -230,7 +230,7 @@ def test_first_wednesday_of_year():
 
 
 def test_first_friday_of_year():
-    d = pendulum.date(1975, 11, 21).first_of("year", 5)
+    d = pendulum.date(1975, 11, 21).first_of("year", 4)
     assert_date(d, 1975, 1, 3)
 
 
@@ -245,7 +245,7 @@ def test_last_tuesday_of_year():
 
 
 def test_last_friday_of_year():
-    d = pendulum.date(1975, 8, 5).last_of("year", 5)
+    d = pendulum.date(1975, 8, 5).last_of("year", 4)
     assert_date(d, 1975, 12, 26)
 
 
diff --git a/tests/datetime/test_day_of_week_modifiers.py b/tests/datetime/test_day_of_week_modifiers.py
index 46de84e7..eb4bc4f7 100644
--- a/tests/datetime/test_day_of_week_modifiers.py
+++ b/tests/datetime/test_day_of_week_modifiers.py
@@ -49,7 +49,7 @@ def test_next_monday():
 
 
 def test_next_saturday():
-    d = pendulum.datetime(1975, 5, 21).next(6)
+    d = pendulum.datetime(1975, 5, 21).next(5)
     assert_datetime(d, 1975, 5, 24, 0, 0, 0)
 
 
@@ -79,7 +79,7 @@ def test_previous_monday():
 
 
 def test_previous_saturday():
-    d = pendulum.datetime(1975, 5, 21).previous(6)
+    d = pendulum.datetime(1975, 5, 21).previous(5)
     assert_datetime(d, 1975, 5, 17, 0, 0, 0)
 
 
@@ -109,7 +109,7 @@ def test_first_wednesday_of_month():
 
 
 def test_first_friday_of_month():
-    d = pendulum.datetime(1975, 11, 21).first_of("month", 5)
+    d = pendulum.datetime(1975, 11, 21).first_of("month", 4)
     assert_datetime(d, 1975, 11, 7, 0, 0, 0)
 
 
@@ -124,7 +124,7 @@ def test_last_tuesday_of_month():
 
 
 def test_last_friday_of_month():
-    d = pendulum.datetime(1975, 12, 5).last_of("month", 5)
+    d = pendulum.datetime(1975, 12, 5).last_of("month", 4)
     assert_datetime(d, 1975, 12, 26, 0, 0, 0)
 
 
@@ -155,7 +155,7 @@ def test_2nd_monday_of_month():
 
 
 def test_3rd_wednesday_of_month():
-    d = pendulum.datetime(1975, 12, 5).nth_of("month", 3, 3)
+    d = pendulum.datetime(1975, 12, 5).nth_of("month", 3, 2)
 
     assert_datetime(d, 1975, 12, 17, 0, 0, 0)
 
@@ -171,7 +171,7 @@ def test_first_wednesday_of_quarter():
 
 
 def test_first_friday_of_quarter():
-    d = pendulum.datetime(1975, 11, 21).first_of("quarter", 5)
+    d = pendulum.datetime(1975, 11, 21).first_of("quarter", 4)
     assert_datetime(d, 1975, 10, 3, 0, 0, 0)
 
 
@@ -231,7 +231,7 @@ def test_2nd_monday_of_quarter():
 
 
 def test_3rd_wednesday_of_quarter():
-    d = pendulum.datetime(1975, 8, 5).nth_of("quarter", 3, 3)
+    d = pendulum.datetime(1975, 8, 5).nth_of("quarter", 3, 2)
     assert_datetime(d, 1975, 7, 16, 0, 0, 0)
 
 
@@ -246,7 +246,7 @@ def test_first_wednesday_of_year():
 
 
 def test_first_friday_of_year():
-    d = pendulum.datetime(1975, 11, 21).first_of("year", 5)
+    d = pendulum.datetime(1975, 11, 21).first_of("year", 4)
     assert_datetime(d, 1975, 1, 3, 0, 0, 0)
 
 
@@ -261,7 +261,7 @@ def test_last_tuesday_of_year():
 
 
 def test_last_friday_of_year():
-    d = pendulum.datetime(1975, 8, 5).last_of("year", 5)
+    d = pendulum.datetime(1975, 8, 5).last_of("year", 4)
     assert_datetime(d, 1975, 12, 26, 0, 0, 0)
 
 
diff --git a/tests/datetime/test_from_format.py b/tests/datetime/test_from_format.py
index 1d5e24ae..184c0a02 100644
--- a/tests/datetime/test_from_format.py
+++ b/tests/datetime/test_from_format.py
@@ -99,7 +99,8 @@ def test_from_format_with_invalid_padded_day():
         ("Monday", "dddd", "2018-01-29T00:00:00+00:00", "2018-02-02"),
         ("Mon", "ddd", "2018-01-29T00:00:00+00:00", "2018-02-02"),
         ("Mo", "dd", "2018-01-29T00:00:00+00:00", "2018-02-02"),
-        ("0", "d", "2018-02-04T00:00:00+00:00", "2018-02-02"),
+        ("0", "d", "2018-01-29T00:00:00+00:00", "2018-02-02"),
+        ("6", "d", "2018-02-04T00:00:00+00:00", "2018-02-02"),
         ("1", "E", "2018-01-29T00:00:00+00:00", "2018-02-02"),
         ("March", "MMMM", "2018-03-01T00:00:00+00:00", "2018-02-02"),
         ("Mar", "MMM", "2018-03-01T00:00:00+00:00", "2018-02-02"),
diff --git a/tests/formatting/test_formatter.py b/tests/formatting/test_formatter.py
index 76c7a7ff..4c4b0088 100644
--- a/tests/formatting/test_formatter.py
+++ b/tests/formatting/test_formatter.py
@@ -113,6 +113,20 @@ def test_day_of_week():
     assert f.format(d, "do") == "0th"
 
 
+def test_localized_day_of_week():
+    f = Formatter()
+    d = pendulum.datetime(2016, 8, 28)
+    assert f.format(d, "e") == "0"
+    assert f.format(d, "e", locale="en-gb") == "6"
+    assert f.format(d.add(days=2), "e") == "2"
+    assert f.format(d.add(days=2), "e", locale="en-gb") == "1"
+
+    assert f.format(d, "eo") == "1st"
+    assert f.format(d, "eo", locale="en-gb") == "7th"
+    assert f.format(d.add(days=2), "eo") == "3rd"
+    assert f.format(d.add(days=2), "eo", locale="en-gb") == "2nd"
+
+
 def test_day_of_iso_week():
     f = Formatter()
     d = pendulum.datetime(2016, 8, 28)
diff --git a/tests/localization/test_tr.py b/tests/localization/test_tr.py
index 258a5de9..5ec00eef 100644
--- a/tests/localization/test_tr.py
+++ b/tests/localization/test_tr.py
@@ -49,10 +49,10 @@ def diff_for_humans():
     assert d.diff_for_humans(locale=locale) == "2 ay önce"
 
     d = pendulum.now().subtract(years=1)
-    assert d.diff_for_humans(locale=locale) == "1 yıl önce"  # noqa: RUF001
+    assert d.diff_for_humans(locale=locale) == "1 yıl önce"
 
     d = pendulum.now().subtract(years=2)
-    assert d.diff_for_humans(locale=locale) == "2 yıl önce"  # noqa: RUF001
+    assert d.diff_for_humans(locale=locale) == "2 yıl önce"
 
     d = pendulum.now().add(seconds=1)
     assert d.diff_for_humans(locale=locale) == "1 saniye sonra"
diff --git a/tests/test_helpers.py b/tests/test_helpers.py
index b9ab63f8..e9317b97 100644
--- a/tests/test_helpers.py
+++ b/tests/test_helpers.py
@@ -170,10 +170,10 @@ def test_week_starts_at() -> None:
 
 def test_week_starts_at_invalid_value() -> None:
     with pytest.raises(ValueError):
-        pendulum.week_starts_at(-1)
+        pendulum.week_starts_at(-1)  # type: ignore[arg-type]
 
     with pytest.raises(ValueError):
-        pendulum.week_starts_at(11)
+        pendulum.week_starts_at(11)  # type: ignore[arg-type]
 
 
 def test_week_ends_at() -> None:
@@ -186,7 +186,7 @@ def test_week_ends_at() -> None:
 
 def test_week_ends_at_invalid_value() -> None:
     with pytest.raises(ValueError):
-        pendulum.week_ends_at(-1)
+        pendulum.week_ends_at(-1)  # type: ignore[arg-type]
 
     with pytest.raises(ValueError):
-        pendulum.week_ends_at(11)
+        pendulum.week_ends_at(11)  # type: ignore[arg-type]