Traditional Culture Encyclopedia - Almanac inquiry - How is the complete date of the tomb determined?

How is the complete date of the tomb determined?

Hello.

It is full of the third of the twelve satellites. This day is only suitable for sacrifice and prayer.

The definition of this day is marked on the yellow calendar. For example, the full date of March 20th15th in Gregorian calendar:

March 5, March 18, March 30.