When is beginning of autumn in 2022?

In 2022, beginning of autumn time is 20:28:57 on August 7, 2022, which falls on the 10th day of the seventh lunar month and is later in beginning of autumn. There are two definitions of beginning of autumn morning and beginning of autumn evening, one is the morning and evening in the day, and the other is the morning and evening in the lunar calendar. The twenty-four solar terms reflect the annual apparent movement of the sun, so the date of the solar terms is basically fixed in the current Gregorian calendar. The first half of the year is 2 1 on the 6th, and the second half is 23/on the 8th, with a difference of 1 to 2 days.

The origin of the twenty-four solar terms

Twenty-four solar terms originated in the Yellow River Basin and were completely established in Qin and Han Dynasties. In BC 104, the taichu calendar written by Deng Ping officially set 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms.

The time required for the sun to travel from zero degrees along the ecliptic to 15 degrees is called a solar term. It runs 360 degrees every year, and * * * experiences 24 solar terms, twice a month. The first solar term of each month is solar term, and the second solar term of each month is neutral. Solar terms and neutral qi appear alternately, each lasting 15 days. Now people have collectively referred to solar terms and neutral gas as solar terms.