The traditional Chinese calendar is lunisolar: its months follow the Moon, beginning near each new moon, while its years are kept in step with the solar cycle. A common year has twelve lunar months of 29 or 30 days; to stop the calendar drifting away from the seasons, a leap year inserts a thirteenth, repeated month — a leap month.
Each calendar year also carries a name from the sixty-year sexagenary cycle, pairing a Heavenly Stem with an Earthly Branch; the branch corresponds to one of the twelve zodiac animals. Explore their calendar positions, elements and traditional relationships in the animal guide.
Because lunar months do not align with Gregorian months, the same Gregorian day can fall on a different lunar date from one year to the next — which is why Chinese New Year and the traditional festivals move around the Gregorian calendar. The month grid above shows both systems side by side.