How many days are there in the lunar calendar?

The lunar calendar belongs to a kind of lunar calendar: its years are divided into flat years and leap years. An average year is twelve months; A leap year is thirteen months. A month is divided into a big month and a small month, with 30 days in the big month and 29 days in the small month, and its average calendar month is equal to the full moon.

The Lunar Calendar (nóng lì) is a traditional calendar in China, and it also has the names of trunk calendar, Chinese calendar, summer calendar and Chinese calendar. Lunar calendar is a kind of lunar calendar, which is usually called lunar calendar by mistake. The lunar calendar takes the change cycle of the moon phase, that is, the length of the moon is one month, plus the "24 solar terms" of the elephant calendar, and takes the length of the tropical year of the sun as the year. By setting leap months, the average calendar year adapts to the tropic year. Lunar calendar is a calendar based on China calendar (lunar calendar) and integrated with solar calendar. Therefore, strictly speaking, the lunar calendar in China should not be called the lunar calendar, but the combined calendar of yin and yang.