Traditional Culture Encyclopedia - The 24 Solar Terms - Why are there solar calendars and lunar calendars?
Why are there solar calendars and lunar calendars?
Lunar calendar: also known as the old calendar, is a kind of yin-yang calendar, which was mistakenly called the lunar calendar in the past. Legend has it that it originated in the Xia Dynasty, so it is also called the Xia calendar. Because it has been used in China for many years, it is customarily called lunar calendar. It is characterized by not only paying attention to the round changes of the moon, but also taking care of all the seasons. In order to coordinate the running laws of the sun and the moon in the calendar, the 7-leap method of 19 is adopted, that is, 7 years plus 1 month (leap month) of 19, and other years are still 12 months. There are 13 months in a year, also called leap year, and there are 383 ~ 385 days in a year; The year of 65438+February is also called the average year, with 353 ~ 355 days in the whole year. The accuracy of this leap calendar is quite high. This calendar divides a solar year into 24 solar terms according to the position of the sun on the ecliptic to facilitate farming. Its disadvantage is that the number of days in a normal year is very different from that in a leap year.
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