Gregorian-Lunar Calendar Convertor

The traditional Chinese calendar or lunar calendar is a lunisolar calendar which takes the Moon's orbit period, i.e. synodic month, as the month and the tropical year as the year. It is also based on the 24 solar terms and sets a leap month to align the average calendar year with the tropical year. Chinese calendar is a calendar based on the lunar calendar (Xia calendar) and in combination with the elements of Gregorian calendar.

As a lunisolar calendar, lunar calendar consists of common year and leap year. A common year has 12 months while a leap year includes 13 months. A month can be either long (30 days) or short (29 days). The average calendar month is equal to a synodic month. The long or short months in a year is determined by reckoning.