When is Jiazi Day?

Jiazi is a dry period. In ancient times, one day and night was divided into twelve hours, that is, one hour was equivalent to two hours, and the corresponding relationship between twelve hours and twenty-four hours was 23 ~ 1.

Starting from Jiazi Day, the time of this day is Jiazi, Picnic, Bingyin, Ding Mao, Chen Wu, Keith ... and the cycle continues in 60 Jiazi.

The calculation formula of Jiazi year corresponding to Gregorian calendar year: let the year be Y, and x, 60x+4 = Y. For example, x = 3360 * 33+4 =1984 =1984 is Jiazi year.

Jiazi month is five years and ten years, and November is the period from heavy snow to slight cold. This is the traditional practice of "building shade in the first month".

For example, from February 20 13 to June 20 14, there was heavy snow, and the following year 1 1 was slightly cold. The method of dividing solar terms into months corresponds to the mantissa of Gregorian calendar year of 3 or 8, and the month between heavy snow and slight cold is Jiazi month.