> Weeks are equally arbitrary to months In the dominant Gregorian calendar and its predecessors. There are others where this is not true. [1][2] [1] https://e

> Weeks are equally arbitrary to months In the dominant Gregorian calendar and its predecessors. There are others where this is not true. [1][2] [1] https://en.wikipedia.org/wiki/Lunar_calendar#List_of_lunar_calendars https://en.wikipedia.org/wiki/Lunar_calendar#List_of_lunar_c... [2] https://en.wikipedia.org/wiki/Lunisolar_calendar#List_of_lunisolar_calendars https://en.wikipedia.org/wiki/Lunisolar_calendar#List_of_lun...