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The expression “Chinese lunar calendar” is convenient but incomplete. China's traditional calendar is lunisolar: its months follow the Moon, while its year is kept aligned with the solar seasons. A lunar month begins at the astronomical new moon and lasts 29 or 30 days. That structure explains why traditional festivals move through the Gregorian calendar instead of keeping one fixed Western date. Numbered days such as “the fifth day of the fifth month” refer to this calendar, not May 5 on the Gregorian calendar. The 24 solar terms guide explains the seasonal markers that run alongside the lunar months.
Twelve lunar months total roughly 354 days, about eleven days shorter than a solar year. The calendar therefore inserts a leap month in some years; it does not simply add a leap day. The placement of that extra month depends on the solar-term system, so a leap month repeats a month number rather than becoming a permanently named thirteenth month. A birthday or anniversary in a repeated month may follow a family convention, and travelers should ask rather than infer. This is why date conversion should use a reliable calendar for the exact year. The fuller Chinese agricultural calendar overview connects lunar months, solar terms and the zodiac cycle.
Traditional Chinese lunisolar calendar and moon-phase reference. The visual relationship between new moon, full moon and numbered lunar days helps explain why festival dates cannot be copied directly into a Gregorian itinerary.
The calendar remains important for Spring Festival, Lantern Festival, Dragon Boat Festival, Qixi, Mid-Autumn Festival and many family observances. Customs and holiday schedules are not identical: a traditional date may be culturally meaningful without creating a statutory day off, and official holiday arrangements can change by year. A festival can also be observed on different practical schedules by a household, temple, museum or race organizer. Travelers should check the current public-holiday notice, transport availability and attraction opening information rather than planning from a generic lunar date. When reading a bilingual calendar, confirm whether a label refers to lunar day one, New Year's Eve or the beginning of a zodiac year. Save both the Gregorian date and the lunar label in trip notes so a hotel or guide can recognize the occasion. Begin with the Chinese New Year guide when the first lunar month affects your itinerary.
