Add next_nth, previous_nth methods to Week, Months

api/src/types/planets/earth/calendar/constants/months.rs

@@ -156,4 +156,12 @@ impl Months {
     pub fn previous(&self) -> Months {
         return Months::from((self.index() - 1_u8) % MONTHS_IN_YEAR);
     }
+
+    pub fn next_nth(&self, nth: u128) -> Months {
+        return Months::from(((self.index() as u128 + nth) % MONTHS_IN_YEAR as u128) as u8);
+    }
+
+    pub fn previous_nth(&self, nth: u128) -> Months {
+        return Months::from(((self.index() as u128 - nth) % MONTHS_IN_YEAR as u128) as u8);
+    }
 }

api/src/types/planets/earth/calendar/constants/week.rs

@@ -89,4 +89,12 @@ impl Week {
     pub fn previous(&self) -> Week {
         return Week::from((self.index() - 1_u8) % DAYS_IN_WEEK);
     }
+
+    pub fn next_nth(&self, nth: u128) -> Week {
+        return Week::from(((self.index() as u128 + nth) % DAYS_IN_WEEK as u128) as u8);
+    }
+
+    pub fn previous_nth(&self, nth: u128) -> Week {
+        return Week::from(((self.index() as u128 - nth) % DAYS_IN_WEEK as u128) as u8);
+    }
 }

tools/date-cli/src/parse.rs

@@ -76,7 +76,7 @@ pub fn parse_args(timezone: &mut Zone, method: &mut fn(CalendarView, u64, u8, u8
                     } else {
                         panic!("[ERROR] Invalid sign in timezone: {char:?}", char = zone_str.chars().nth(0));
                     }
-                    
+
                     let zone_values: Vec<u8> = zone_str[1..]
                         .split(':')
                         .map(|x| x.parse::<u8>())