At a glance
- Chinese calendar type
- Lunisolar
Definition and scope
Although colloquially called a lunar calendar, the Chinese calendar is lunisolar: months follow lunar phases and intercalation keeps the year near the seasons. The Gregorian system uses twelve ordered months with leap days. Both can name the same day through different coordinates; choosing a calendar does not alter celestial motion.
Structure and details
Chinese months normally have twenty-nine or thirty days, and a year can contain twelve or thirteen months. Gregorian month lengths are fixed by rule, with a leap day in February. Adding a Chinese leap month is different from adding a Gregorian leap day. Preserve the leap label when recording a Chinese date.
Example and history
Lunar New Year moves within the Gregorian calendar and is distinct from January first. Observatory conversion tables let readers compare the two date systems directly. Choose a date, find its Chinese month and day, then inspect neighboring dates for a month boundary. This illustrates the relationship better than memorizing one festival date.
Contexts and limits
Historical records also require era names, local conventions and awareness of calendar reforms. Modern birthday observance is a cultural choice between date systems. Events with clock times need a time standard. Zodiac-year conventions, solar-term months and Chinese lunar months have different boundaries even when a printed calendar displays all of them.
References & further reading
Historical sources document ideas and rules of their time, not empirical proof of predictive accuracy. Source notes identify the nature and scope of each reference.
- Hong Kong Observatory: The Chinese Agricultural CalendarInstitutional / reference source
Observatory explanation of lunar months, years and solar cycles, used for calendrical facts.
- Hong Kong Observatory: Gregorian–Lunar Calendar Conversion TableInstitutional / reference source
Official calendar conversion tables; users must preserve leap-month labels and time conventions.