What does the solar calendar mean?

Gregorian calendar is the date of a month mentioned in the calendar, which is the calendar on which you go to school and work.

There are differences in time, date and name between the solar calendar and the lunar calendar. The solar calendar is calculated by the sun and the lunar calendar by the moon. The normal year of the lunar calendar is twelve months, with 354 days or 355 days in the whole year. The solar calendar has 365 days in a normal year and 366 days in a leap year, which occurs every four years.

The length of a calendar month is determined by the astronomical phenomena. The big month is the 30th and the small month is the 29th. Gregorian calendar month 3 1 day, month 30 days. The special February 28 is 28 days in a normal year and 29 days in a leap year.

The basis for determining the month in the lunar calendar

The lunar calendar determines the moon on the basis of its motion law: the orbit of the moon is called the white road, and both the white road and the ecliptic road 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, lasting 7 hours and 43 minutes 1 1.5 seconds (27.32 days), which is called the "sidereal moon".

Only when the moon revolves around the earth, the position of the earth changes because of its revolution around the sun. The forward number exceeds 27 degrees, and the moon runs 13 degrees 15 minutes every day, so it takes 29 days 12: 44: 2.8 (29.53 days) for the moon to return to the moon, which is called "the first month" and is called the month by custom.