What day is the lunar calendar in Tomb-Sweeping Day?

The time in Tomb-Sweeping Day is between April 4th and 6th in the Gregorian calendar every year, and there is no exact lunar calendar time.

For example, in 2020, the lunar calendar in Tomb-Sweeping Day is March 12, and the lunar calendar in Tomb-Sweeping Day is February 23rd. The twenty-four solar terms were originally formulated according to the changes of stars, but now they are formulated according to the return of the sun on the ecliptic.

Tomb-Sweeping Day is a date between April 4th and April 6th, which is not fixed, and April 5th is the most in Tomb-Sweeping Day. The statistical results show that in the five 18 years from 1582 to 2 100 when the current Gregorian calendar is adopted, the Qingming Festival is 2 19 on April 4th, 28 1 on April 5th and at least18 on April 6th.

Tomb-Sweeping Day date determination method:

One revolution of the earth is 360 degrees of the yellow meridian, and when the earth reaches zero degrees of the yellow meridian, it is designated as the vernal equinox, and then there is a solar term every time it runs 15 degrees, and there are 24 solar terms in * * *. Therefore, the dates of solar terms in the solar calendar are fixed, because leap years differ by at most two days. The lunar calendar is a yin-yang calendar that reflects phenological changes and guides agricultural time, and it also combines the 29.5-day cycle from lunar calendar to lunar phase.

A year is 12 months, but every month is 30 days, which is bound to be different. According to the solar calendar, Qingming can be set on April 5 or 4 (depending on February 29 of that year). Astronomically speaking, on April 5 or 6, when the sun (that is, the position of the sun on the ecliptic) reaches 15 degrees on the ecliptic, it can be designated as Qingming.