What day is March 9, 2022?

March 9, 2022 is the seventh day of the second lunar month.

The lunar calendar takes the lunar phase as the cycle, and each lunar phase changes to one month; A tropical year is divided into 24 segments, forming 24 solar terms. By referring to the tropic year of the sun, leap months are set to adapt their average calendar year to the tropic year. The lunar calendar combines the lunar calendar with the solar calendar to form a method of combining yin and yang.

The lunar calendar is also called summer calendar, lunar calendar, old calendar, middle calendar and lunar calendar. Because of the use of Xia Zheng, it was often called Li Xia in the old society. After 1970, Li Xia was renamed as Lunar Calendar. The lunar calendar is a combination of yin and yang, and the years are divided into flat years and leap years. An average year is twelve months; A leap year is thirteen months. A month is divided into a big month and a small month, with 30 days in the big month and 29 days in the small month, and its average calendar month is equal to the full moon.

Calculation method of lunar calendar

The lunar calendar is based on the new moon. The time of the first lunar month is 29th 12 hours, 44 minutes and 3 seconds (that is, 29.5366 days), so the lunar calendar is also 30 days for the big month and 29 days for the small month, but it is not exactly the same as the pure lunar calendar, because the pure lunar calendar is arranged alternately with big and small months, and the size and month of the lunar calendar are determined by calculation.

The first day of each month in the lunar calendar happens to be a new moon (that is, when the moon is in the middle of the sun and the earth faces the earth with a dark half). Sometimes there may be two big months or two small months in a row. Because the first month of the lunar calendar is slightly longer than 29 and a half days, there are about 53 big months and 47 small months in every 100 calendar month of the lunar calendar.