Today is the first day of the lunar calendar?

Today is 2020 Gregorian calendar165438+1October 28th.

October 14th of the lunar calendar.

Lunar calendar is one of the traditional calendars in China, also known as lunar calendar, lunar calendar, ancient calendar, Han calendar, yellow calendar, summer calendar and old calendar.

In astronomy, it mainly refers to the calendar arranged according to the moon phase cycle, in which the moon orbits the earth once (based on the sun, the actual moon orbits more than once). ) is January, which is a calendar based on the moon. There are twelve calendar months in a year. In the process of calendar development and evolution, the emergence of 24 solar terms was used to guide agricultural production scientifically, and the lunar calendar (Han calendar) was formed. Although the lunar calendar and lunar calendar are commonly known as ancient calendar, Han calendar, summer calendar and old calendar, there are still differences between lunar calendar and lunar calendar (Han calendar). The traditional summer calendar (Han calendar) is actually a kind of yin-yang calendar.

The lunar calendar determines the moon according to the motion law of the moon ball: 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 twice on the ecliptic for 7 hours and 43 minutes 1 1.5 seconds (27.32 days), so it is called "the sidereal moon". Only when the moon revolves around the earth, the position of the earth will change because of its revolution around the sun, counting forward more than 27 degrees, and the moon runs at the speed of 13 degrees 15 minutes every day, so it takes the moon 29 days 12:44:2.8(29.53 days) to return to the moon, which is called ".