Historically, lunisolar calendars intercalated entire leap months on an observational basis. Lunisolar calendars have mostly fallen out of use except for liturgical reasons (Hebrew calendar, various Hindu calendars).
Historically, lunisolar calendars intercalated entire l?eap months on an? observational basis. L?u!nisolar calendars have mostly fallen out of use except for liturgical reasons (Hebrew calendar, various Hindu calendars).