When will Diwang be useful?

Statement 1: Take Shili (beginning of spring, Changsha, beginning of autumn, beginning of winter) as an example: Generally speaking, ordinary books are based on the eighteen days before Shili.

20 14 (lunar calendar): March 18, noon, March 18, 2008. Don't break ground for 18 days before handing over the land to King Chang Xia.

Don't touch the ground until June 24th, 2008 when the land is handed over to Diwang to work in beginning of autumn 18.

On September 27th, Jia was stationed on duty and handed over the land to the king. It was forbidden to break ground 18 days before winter.

1 1 Don't touch the ground for 8 days before handing it over to Diwang at noon on the 27th of the month/kloc-0.

Statement 2: Calculated by the solar meridian:

The solar ecliptic of the twenty-four solar terms is: before the fourth solar term 18 degrees is the Diwang service day.

Spring: 3 15 degrees in beginning of spring, 330 degrees in rain, 345 degrees in fright, 360 degrees in vernal equinox, 30 degrees in Qingming 15 degrees in Grain Rain.

Summer: 45 degrees in the long summer, 60 degrees in the small summer, 75 degrees in the awn grass, 90 degrees in the summer solstice, 0/05 degrees in the hot summer/kloc, 0/20 degrees in the hot summer/kloc.

Autumn: beginning of autumn 135 degrees, summer 150 degrees, Millennium 165 degrees, autumnal equinox 180 degrees, cold dew 195 degrees, and first frost 2 10 degrees.

Winter: 225 degrees in early winter, 240 degrees in light snow, 255 degrees in heavy snow, 270 degrees in winter solstice, 285 degrees in slight cold and 300 degrees in severe cold.

Statement 3: The first day of the statement and the day of Wu have long passed, and the time or sound is the earth day, so don't touch the ground.

The first statement is the most common, the second statement has been revised by modern scholars, and the third statement is based on five behaviors.

There is no such thing in my hometown. Beginning of spring Day on 20 15 is February 4th on 20 15 in the solar calendar. According to the statement 1, 20 15 17 to February 3 18, it is not suitable to break ground. Statement 2 is basically the same as statement 1, and sometimes there may be some differences. Personally, I think the statement 1 is enough.