Linked from
The 15 pages that link to Lunar month, each with the reason it gives.
Islamic calendarBroader topic: Islamic months follow the lunar cycle and last 29 or 30 days.
Hebrew calendarNarrower topic: Hebrew calendar months approximate this recurring lunar interval.
IntercalationRelated: Its length does not divide evenly into a solar year, motivating leap months.
CalendarRelated: Its length motivates the alternating month patterns of lunisolar calendars.
Babylonian calendarRelated: Babylonian months alternated between 29 and 30 days to track the Moon.
Hindu calendarRelated: Many Hindu calendars organize months around lunar cycles.
Lunar New YearRelated: Lunar months make the calendar date shift against the Gregorian calendar.
WeekCompared with: Its length does not align exactly with a whole number of weeks.
Islamic New YearRelated: Twelve lunar months make the Hijri year shorter than a solar year.
Zu ChongzhiRelated: Its measured length determines how lunar months can be fitted to the solar year.
Hijri eraBroader topic: Hijri months follow lunar cycles, making the year shorter than a solar year.