Leap moon in 2022?
Leaping month is a way of calendar leap. In Asia (especially China), leap month refers to the month that is added every two to three years in the lunar calendar. In order to coordinate the contradiction between the tropic year and the lunar year and prevent the lunar year from being out of touch with the tropic year, that is, the four seasons, 1 leap is set every 2~3 years. The leap week of 19 was used in ancient times, but the Linde calendar of the Tang Dynasty abolished the fixed leap week, and the leap was set in the month without season, so it was a leap time.
The mid-year month of the lunar calendar is based on the length of 29.5306 days in the first lunar month, so the big month is 30 days and the small month is 29 days. In order to ensure that the first day of each month (the first day) must be a new moon, the arrangement of large and small months is not fixed and needs to be determined through strict observation and calculation. Therefore, it is common for the lunar calendar to be big and small for two consecutive months, and even there are rare exceptions such as March and April of 1990. September, 10,1month and1February are big for four consecutive months.