20 1 1 When did the rainy season begin in Suzhou?

Suzhou News Network (Reporter Wei Lun) Based on a variety of factors, the Suzhou Meteorological Observatory announced that from today (June 9) night, Suzhou will enter the Meiyu period. After May, there will be a strong precipitation process from tomorrow to 1 1, and there will be an obvious precipitation weather on 14- 15, while the weather on 12- 13 is relatively good. There are not many typical rainy days in Suzhou in recent years, especially last year, which is quite abnormal. In 30 days, it only rained185.9 mm.

Traditionally, in China, the judgment of plum entry and plum exit is based on the combination of solar terms and branches. According to the calendar, the first third day after mango seeds is plum blossom, and the first last day in Xia Hou is plum blossom. If the weather on the awning day is C, it is designated as entering the plum blossom, and if it is not in the shallow summer, it is designated as leaving the plum blossom.

explain

On June 6, 2006, mango seeds fell and entered Mei on the same day. July 17 coincides with a weekend after the intense summer heat, so the plum blossom date in 2006 is July 17. Huangmeitian ***42 days. The specific heart algorithm is as follows. Enter the formula of plum blossom day: d =(7-Y)Mod 10, where Y=(5 (odd years)+[2 digits after the year ]) mod 10. In 2006, Y=0+[6/4]= 1 and D=7- 1=6, so it was June 6th. The formula is: D= 12-Y, Y=(6×5+[6/4])Mod 12=7 (see plum blossom entry for details), and D= 12-7=5, because July 5th is before light summer.