When did 202 1 year enter? When did 202 1 year enter?

1, crouching means entering the dog days. "On the summer solstice, the head of the three gengzi falls", which is the basis for establishing the first autumn. The entry time of 202 1 year is: Gregorian calendar 202 1 July 1 1 Sunday; Lunar year of the ox, the second day of June.

2. Calculation method: China used the method of combining heavenly stems and earthly branches to record time in ancient times. The number of heavenly stems is 65,438+00 and the number of terrestrial branches is 65,438+02. "Three Geng" is the time to meet three "Geng" characters, and the first time is on the third Geng Day. Because there are 10 days, there is a Geng day every 10 days. 365 days a year (366 days in leap year) is not an integer multiple of 10. One day this year is Geng Day, and next year is not necessarily Geng Day. Due to the uncertainty of Geng day, the date of accommodation is different every year.