How is the alternating time of the twenty-four solar terms in the lunar calendar calculated?

Twenty-four solar terms table

spring

Beginning of Spring

3-5 February

Rain Water

February 18-20

Awakening of Insects

5-7 March

Spring Equinox

20-22 March

Qingming Festival

April 4-6

Grain Rain

April 19-2 1

summer

Early summer

5-7 May

Grain Buds

20-22 May

Grain in Ear

5-7 June

Summer solstice

June 2 1-22

Minor Heat

6-8 July

Major Heat

July 22nd-24th

autumn

Beginning of Autumn

August 7-9

The heat is over

22-24 August

White Dew

7-9 September

Autumn Equinox

22-24 September

Cold Dew

65438+18 -9 October

Frost's Descent

65438+123-24 October

winter

season

Beginning of Winter

165438+17-8 October

Minor Snow

165438+122-23 October

Major Snow

65438+6 -8 February

Winter solstice

65438+February 2 1-23

Minor Cold

65438+15 -7 October

Major Cold

65438+1October 20 -2 1

Twenty-four solar term song

The spring rain shocks the spring and the valley, and the summer is full of mountains and summer heat.

There are dewdrops in autumn, first frost in cold, light snow in winter and cold in winter.

Two festivals in a month remain the same, with a difference of one or two days at most.

The first half of the year is 62 1, and the second half is 823.