Choose a date: how to calculate construction, division, sufficiency, equality, determination, persistence, destruction, danger, success, closure, opening and closing?

Lunar calendar1February corresponding to the earthly branch is

January, February, March, April, May, June, July, August, September, October, November and December.

In the afternoon, Chen hasn't applied to defend Haizi Ugly.

On the first day of the first month of each month (beginning of spring), the first day is the day of construction, and it will be postponed afterwards. On the second day of February (the day of fright), it was built in turn. When it is completed, it will be dark (that is, the day of the underworld), and it will be useful to break the ecliptic (the auspicious day of the ecliptic). For example, 20 10 on the 29th of the twelfth lunar month, the main branch is the light cold (festival) in Wuwu, which is the third day, while the ugly day is built on the 29th of the twelfth lunar month, and the ugly day is built on the seventh day (after the festival), so the sixth day and the 19th day are also built in Ding Chou, while the 30th (New Year's Eve) is not a day but a closed day this year, and the 28th day (auspicious) is the first day.