Calendar query when the lunar calendar enters the night.

July 14, the first day of the first ambush.

July 24th, the first day of lunch.

August 13, the first day of the last night.

The entry date of a normal year can only be 5 days earlier or 5 days later than that of the previous year.

Entering a crouching state means entering the dog days.

"Summer, night, a few heads fall", which is the basis for establishing the first autumn.

Count the third day of the summer solstice as the first time, see which day the summer solstice is represented by dry branches, and then postpone it in turn. Meet a "G" day, even if it is the first G, meet the third "G" day, and start counting volts from that day, which is the first day of the first autumn. This year's summer is the day of Wushen on June 22, and the day of June 24, which is the first year of summer. Ten days later, July 4 is the fourth day, which is the second Geng day in summer. Ten days later, July 14 is the third Geng day in summer, so July 14 is the first day of this year.

Three volts refers to three consecutive periods of initial, intermediate and final voltage.

The number of days for the first stay is fixed, from summer to the third Geng day to the second Geng day in the future, the first stay is ten days. The first day of 2009 is from July 14 (Gengshen Day) to July 23rd.

The number of days of squatting is uncertain, from summer to the fourth Geng Day in the future to the first Geng Day after beginning of autumn. So the number of days in the middle section is sometimes 10 days, but in some years it is 20 days. The Mid-Autumn Festival in 2009 lasts for 20 days from July 24th (Gengwu Day) to August 12. August 3rd is Chen Geng Day, and August 7th (Gui You Day) is the beginning of autumn.

The end is certain, starting from the first Geng Day after beginning of autumn and ending before the second Geng Day after beginning of autumn. The past ten days. The end of 2009 is from August 13 (Geng Yin Day) to August 22nd.