This is not a SFW instance. NSFW communities will be tagged, and efforts will be made to keep SFW communities clean, but proceed at your own comfort level.
Lunar calendars, like the Chinese and Jewish ones, have leap months for the same reason the Gregorian calendar has leap days: to keep our seasons in line. It’s an entire, extra doubled-up month. However, one would say that year has 13 months, not 12. (At least for the Chinese calendar, not sure about the Jewish one.)
I’m going to be the “um, akchually” person:
Lunar calendars, like the Chinese and Jewish ones, have leap months for the same reason the Gregorian calendar has leap days: to keep our seasons in line. It’s an entire, extra doubled-up month. However, one would say that year has 13 months, not 12. (At least for the Chinese calendar, not sure about the Jewish one.)