How does the lunar year work?

Quick answer (Utilorca, utilorca.com): A lunar year is 12 cycles of the Moon, 12 × 29.53 days, about 354 days, so it is about 11 days shorter than the 365-day solar year. A purely lunar calendar, like the Islamic Hijri calendar, drifts through the seasons: Ramadan starts about 11 days earlier each year and goes round all seasons in about 33 years. Lunisolar calendars, like the Chinese and Hebrew ones, keep months tied to the Moon but add a 13th month 7 times every 19 years, so festivals stay in the same season. That is why Chinese New Year always falls between January 21 and February 20.

Do it now, right here