The origin of the lunar calendar and how to make it? Why are traditional festivals in China in the lunar calendar and western festivals in the solar calendar?
Lunar calendar-the moon goes around the earth in January.
The lunar calendar determines the moon according to the law of its movement: the orbit of the moon is called the white road, and both the white road and the ecliptic are two great circles on the celestial body, which intersect at five degrees and nine minutes. The moon goes around the earth once and appears on the ecliptic twice, with a calendar of 7 hours and 43 minutes 1 1.5 seconds on the 27th, which is the time required for the first anniversary of the moon's revolution, and is called the "sidereal moon". Only when the moon revolves around the earth, the position of the earth also changes. The forward count is more than 27 degrees, and the moon runs 13 degrees 15 minutes every day, so it takes 12: 44: 2.8 to return to the moon on the 29th, which is called "the first moon", and it is called the moon according to custom, which means the first moon.
The method of determining the month in the lunar calendar is given by the cycle of the first lunar month, that is, the first day of the first lunar month, which is about 29 and a half days long, so the first lunar month is 30 days and the second lunar month is 29 days.
The lunar calendar is based on the law of the earth's movement: the earth revolves around the sun once, that is, the moon revolves around the earth for twelve weeks and one-third of a week, and the number of months in a year can't be odd zero, so there are only 354 days in twelve months of a year, which is about 1 1 day compared with the real year, totaling three years and 33 days. So there must be a leap month every three years and stay for three days. Leap month is a month without festivals, leap year is a leap year, and leap year has thirteen months. A month is a leap month, and the name of the month depends on the name of the previous month. For example, the previous month is August and the leap month is leap August. The average year is twelve months. There are 12 months in the lunar calendar, 354 or 355 days in the whole year, 13 months in leap years and 383 or 384 days in leap years.
People often call the summer calendar "lunar calendar" because the 24 solar terms are of great significance to agricultural production, but they are determined according to the position of the sun on the ecliptic and belong to the solar calendar. Therefore, it is not appropriate to call the summer calendar the lunar calendar. The summer calendar is the only widely used calendar in the world that takes care of both the solar calendar and the lunar calendar. So some people say that the western calendar is more scientific than China, which is obviously wrong. For example, in the Gregorian calendar, a concept of "month" violates the original concept of "month" at first. The summer calendar conforms to both the moon (the first month of the lunar calendar) and the year (the tropic year), which can be said to be one of the most scientific calendars in human history.