diff --git a/stubs/python-dateutil/dateutil/parser/_parser.pyi b/stubs/python-dateutil/dateutil/parser/_parser.pyi
index e4784c89c109..9119ec25d7b7 100644
--- a/stubs/python-dateutil/dateutil/parser/_parser.pyi
+++ b/stubs/python-dateutil/dateutil/parser/_parser.pyi
@@ -1,5 +1,5 @@
 import re
-from _typeshed import Incomplete, SupportsRead
+from _typeshed import SupportsRead
 from collections.abc import Callable, Mapping
 from datetime import _TzInfo, datetime
 from io import StringIO
@@ -58,22 +58,21 @@ class parserinfo:
     def convertyear(self, year: int, century_specified: bool = False) -> int: ...
     def validate(self, res: datetime) -> bool: ...
 
-class _ymd(list[Incomplete]):
+class _ymd(list[int]):
     century_specified: bool
     dstridx: int | None
     mstridx: int | None
     ystridx: int | None
-    def __init__(self, *args, **kwargs) -> None: ...
     @property
     def has_year(self) -> bool: ...
     @property
     def has_month(self) -> bool: ...
     @property
     def has_day(self) -> bool: ...
-    def could_be_day(self, value): ...
-    def append(self, val, label=None): ...
-    def _resolve_from_stridxs(self, strids): ...
-    def resolve_ymd(self, yearfirst: bool | None, dayfirst: bool | None): ...
+    def could_be_day(self, value: int) -> bool: ...
+    def append(self, val: str | int, label: str | None = None) -> None: ...
+    def _resolve_from_stridxs(self, strids: dict[str, int]) -> tuple[int, int, int]: ...
+    def resolve_ymd(self, yearfirst: bool | None, dayfirst: bool | None) -> tuple[int, int, int]: ...
 
 class parser:
     info: parserinfo
diff --git a/stubs/python-dateutil/dateutil/rrule.pyi b/stubs/python-dateutil/dateutil/rrule.pyi
index 53bdbe4ba440..dd712283fd3a 100644
--- a/stubs/python-dateutil/dateutil/rrule.pyi
+++ b/stubs/python-dateutil/dateutil/rrule.pyi
@@ -1,9 +1,10 @@
 import datetime
-from _typeshed import Incomplete
-from collections.abc import Generator, Iterable, Iterator, Sequence
+from collections.abc import Callable, Generator, Iterable, Iterator, Mapping, Sequence
 from typing import Final, Literal, overload
 from typing_extensions import Self, TypeAlias
 
+from dateutil.parser._parser import _TzInfos
+
 from ._common import weekday as weekdaybase
 
 __all__ = [
@@ -58,13 +59,15 @@ SU: weekday
 class rrulebase:
     def __init__(self, cache: bool | None = False) -> None: ...
     def __iter__(self) -> Iterator[datetime.datetime]: ...
-    def __getitem__(self, item): ...
-    def __contains__(self, item) -> bool: ...
+    def __getitem__(self, item: int | slice) -> datetime.datetime: ...
+    def __contains__(self, item: datetime.datetime) -> bool: ...
     def count(self) -> int | None: ...
-    def before(self, dt, inc: bool = False): ...
-    def after(self, dt, inc: bool = False): ...
-    def xafter(self, dt, count=None, inc: bool = False) -> Generator[Incomplete]: ...
-    def between(self, after, before, inc: bool = False, count: int = 1) -> list[Incomplete]: ...
+    def before(self, dt: datetime.datetime, inc: bool = False): ...
+    def after(self, dt: datetime.datetime, inc: bool = False): ...
+    def xafter(self, dt: datetime.datetime, count: int | None = None, inc: bool = False) -> Generator[datetime.datetime]: ...
+    def between(
+        self, after: datetime.datetime, before: datetime.datetime, inc: bool = False, count: int = 1
+    ) -> list[datetime.datetime]: ...
 
 class rrule(rrulebase):
     def __init__(
@@ -156,22 +159,22 @@ class _iterinfo:
 
 class rruleset(rrulebase):
     class _genitem:
-        dt: Incomplete
-        genlist: list[Incomplete]
-        gen: Incomplete
-        def __init__(self, genlist, gen) -> None: ...
+        dt: datetime.datetime
+        genlist: list[Self]
+        gen: Iterator[datetime.datetime]
+        def __init__(self, genlist: list[Self], gen: Iterator[datetime.datetime]) -> None: ...
         def __next__(self) -> None: ...
         next = __next__
-        def __lt__(self, other) -> bool: ...
-        def __gt__(self, other) -> bool: ...
-        def __eq__(self, other) -> bool: ...
-        def __ne__(self, other) -> bool: ...
+        def __lt__(self, other: Self) -> bool: ...
+        def __gt__(self, other: Self) -> bool: ...
+        def __eq__(self, other: object) -> bool: ...
+        def __ne__(self, other: object) -> bool: ...
 
     def __init__(self, cache: bool | None = False) -> None: ...
     def rrule(self, rrule: _RRule) -> None: ...
-    def rdate(self, rdate) -> None: ...
-    def exrule(self, exrule) -> None: ...
-    def exdate(self, exdate) -> None: ...
+    def rdate(self, rdate: datetime.datetime) -> None: ...
+    def exrule(self, exrule: _RRule) -> None: ...
+    def exdate(self, exdate: datetime.datetime) -> None: ...
 
 class _rrulestr:
     @overload
@@ -185,8 +188,8 @@ class _rrulestr:
         unfold: bool = False,
         compatible: bool = False,
         ignoretz: bool = False,
-        tzids=None,
-        tzinfos=None,
+        tzids: Callable[[str], datetime.tzinfo] | Mapping[str, datetime.tzinfo] | None = None,
+        tzinfos: _TzInfos | None = None,
     ) -> rruleset: ...
     @overload
     def __call__(
@@ -199,8 +202,8 @@ class _rrulestr:
         unfold: bool = False,
         forceset: bool = False,
         ignoretz: bool = False,
-        tzids=None,
-        tzinfos=None,
+        tzids: Callable[[str], datetime.tzinfo] | Mapping[str, datetime.tzinfo] | None = None,
+        tzinfos: _TzInfos | None = None,
     ) -> rruleset: ...
     @overload
     def __call__(
@@ -213,8 +216,8 @@ class _rrulestr:
         forceset: bool = False,
         compatible: bool = False,
         ignoretz: bool = False,
-        tzids=None,
-        tzinfos=None,
+        tzids: Callable[[str], datetime.tzinfo] | Mapping[str, datetime.tzinfo] | None = None,
+        tzinfos: _TzInfos | None = None,
     ) -> rrule | rruleset: ...
 
 rrulestr: _rrulestr
diff --git a/stubs/python-dateutil/dateutil/tz/_common.pyi b/stubs/python-dateutil/dateutil/tz/_common.pyi
index 7e9b8957c34b..430dabab3a7e 100644
--- a/stubs/python-dateutil/dateutil/tz/_common.pyi
+++ b/stubs/python-dateutil/dateutil/tz/_common.pyi
@@ -24,5 +24,5 @@ class tzrangebase(_tzinfo):
     def fromutc(self, dt: datetime) -> datetime: ...
     def is_ambiguous(self, dt: datetime) -> bool: ...
     __hash__: ClassVar[None]  # type: ignore[assignment]
-    def __ne__(self, other): ...
+    def __ne__(self, other: object) -> bool: ...
     __reduce__ = object.__reduce__
diff --git a/stubs/python-dateutil/dateutil/tz/tz.pyi b/stubs/python-dateutil/dateutil/tz/tz.pyi
index 475ace6a4bd7..0fad227656a0 100644
--- a/stubs/python-dateutil/dateutil/tz/tz.pyi
+++ b/stubs/python-dateutil/dateutil/tz/tz.pyi
@@ -1,6 +1,8 @@
 import sys
+from _typeshed import Unused
 from datetime import datetime, timedelta, tzinfo
-from typing import ClassVar, Literal, Protocol, TypeVar, type_check_only
+from typing import Any, ClassVar, Literal, Protocol, TypeVar, type_check_only
+from typing_extensions import Self
 
 from ..relativedelta import relativedelta
 from ._common import _tzinfo, enfold as enfold, tzrangebase
@@ -23,26 +25,26 @@ class tzutc(tzinfo):
     def tzname(self, dt: datetime | None) -> str: ...
     def is_ambiguous(self, dt: datetime | None) -> bool: ...
     def fromutc(self, dt: _DT) -> _DT: ...
-    def __eq__(self, other): ...
+    def __eq__(self, other: object) -> bool: ...
     __hash__: ClassVar[None]  # type: ignore[assignment]
-    def __ne__(self, other): ...
+    def __ne__(self, other: object) -> bool: ...
     __reduce__ = object.__reduce__
 
 UTC: tzutc
 
 class tzoffset(tzinfo):
-    def __init__(self, name, offset) -> None: ...
+    def __init__(self, name: str | None, offset: float | timedelta) -> None: ...
     def utcoffset(self, dt: datetime | None) -> timedelta | None: ...
     def dst(self, dt: datetime | None) -> timedelta | None: ...
     def is_ambiguous(self, dt: datetime | None) -> bool: ...
     def tzname(self, dt: datetime | None) -> str: ...
     def fromutc(self, dt: _DT) -> _DT: ...
-    def __eq__(self, other): ...
+    def __eq__(self, other: object) -> bool: ...
     __hash__: ClassVar[None]  # type: ignore[assignment]
-    def __ne__(self, other): ...
+    def __ne__(self, other: object) -> bool: ...
     __reduce__ = object.__reduce__
     @classmethod
-    def instance(cls, name, offset) -> tzoffset: ...
+    def instance(cls, name: str | None, offset: float | timedelta) -> tzoffset: ...
 
 class tzlocal(_tzinfo):
     def __init__(self) -> None: ...
@@ -50,9 +52,9 @@ class tzlocal(_tzinfo):
     def dst(self, dt: datetime | None) -> timedelta | None: ...
     def tzname(self, dt: datetime | None) -> str: ...
     def is_ambiguous(self, dt: datetime | None) -> bool: ...
-    def __eq__(self, other): ...
+    def __eq__(self, other: object) -> bool: ...
     __hash__: ClassVar[None]  # type: ignore[assignment]
-    def __ne__(self, other): ...
+    def __ne__(self, other: object) -> bool: ...
     __reduce__ = object.__reduce__
 
 class _ttinfo:
@@ -65,9 +67,9 @@ class _ttinfo:
     isgmt: bool
     dstoffset: timedelta
     def __init__(self) -> None: ...
-    def __eq__(self, other): ...
+    def __eq__(self, other: object) -> bool: ...
     __hash__: ClassVar[None]  # type: ignore[assignment]
-    def __ne__(self, other): ...
+    def __ne__(self, other: object) -> bool: ...
 
 @type_check_only
 class _TZFileReader(Protocol):
@@ -82,11 +84,11 @@ class tzfile(_tzinfo):
     def utcoffset(self, dt: datetime | None) -> timedelta | None: ...
     def dst(self, dt: datetime | None) -> timedelta | None: ...
     def tzname(self, dt: datetime | None) -> str: ...
-    def __eq__(self, other): ...
+    def __eq__(self, other: object) -> bool: ...
     __hash__: ClassVar[None]  # type: ignore[assignment]
-    def __ne__(self, other): ...
-    def __reduce__(self): ...
-    def __reduce_ex__(self, protocol): ...
+    def __ne__(self, other: object) -> bool: ...
+    def __reduce__(self) -> tuple[type[Self], tuple[None, str], dict[str, Any]]: ...
+    def __reduce_ex__(self, protocol: Unused) -> tuple[type[Self], tuple[None, str], dict[str, Any]]: ...
 
 class tzrange(tzrangebase):
     hasdst: bool
@@ -100,13 +102,13 @@ class tzrange(tzrangebase):
         end: relativedelta | None = None,
     ) -> None: ...
     def transitions(self, year: int) -> tuple[datetime, datetime]: ...
-    def __eq__(self, other): ...
+    def __eq__(self, other: object) -> bool: ...
 
 class tzstr(tzrange):
     hasdst: bool
     def __init__(self, s: str, posix_offset: bool = False) -> None: ...
     @classmethod
-    def instance(cls, name, offset) -> tzoffset: ...
+    def instance(cls, name: str | None, offset: float | timedelta) -> tzoffset: ...
 
 @type_check_only
 class _ICalReader(Protocol):
@@ -116,8 +118,8 @@ class _ICalReader(Protocol):
 
 class tzical:
     def __init__(self, fileobj: str | _ICalReader) -> None: ...
-    def keys(self): ...
-    def get(self, tzid=None): ...
+    def keys(self) -> list[str]: ...
+    def get(self, tzid: str | None = None) -> tzinfo | None: ...
 
 TZFILES: list[str]
 TZPATHS: list[str]
diff --git a/stubs/python-dateutil/dateutil/zoneinfo/__init__.pyi b/stubs/python-dateutil/dateutil/zoneinfo/__init__.pyi
index 3be08148bf08..65627ecdd773 100644
--- a/stubs/python-dateutil/dateutil/zoneinfo/__init__.pyi
+++ b/stubs/python-dateutil/dateutil/zoneinfo/__init__.pyi
@@ -16,7 +16,8 @@ ZONEFILENAME: Final[str]
 METADATA_FN: Final[str]
 
 class tzfile(_tzfile):
-    def __reduce__(self) -> tuple[Callable[[str], Self], tuple[str, ...]]: ...
+    # source code does this override, changing the type
+    def __reduce__(self) -> tuple[Callable[[str], Self], tuple[str]]: ...  # type: ignore[override]
 
 def getzoneinfofile_stream() -> BytesIO | None: ...