Do you have the number 3 1 in the lunar calendar?

There is no 3 1 day in the lunar calendar. In 12 months of a year, there are 6 odd-numbered months (namely 1, 3, 5, 7, 9, 1 1) as "big construction", and each month is 30 days. Six even-numbered months (February, April, June, August, 10, 65438+ February) are "Xiao Jian", and each month is 29 days; In leap year, the month of 65438+ February will be changed to 30 days.

The calendar takes 30 years as a cycle, and the 2nd, 5th, 7th, 10, 13, 16, 18, 2 1, 24th, 26th and 29th years in each cycle are/kloc-.

Extended data:

The convenience of the lunar calendar is that its calendar rotation reflects the change of the moon phase, and all the moons appear on a certain date: the new moon is the first day, and the full moon is half moon; The first quarter and the second quarter are the eighth and twenty-third days respectively. The ancients could judge the date by the phase of the moon.

However, the defects of the lunar calendar are also obvious. The calendar year is about 1 1 day shorter than the tropical year, and the monthly sequence has no seasonal significance. If a Lunar New Year coincides with heavy snow, people will wave their fans for the new year after 17 years. Such a calendar can't meet the needs of agricultural production, so it has long been abandoned. The only remaining lunar calendar in the world today is hijri, which has become a traditional calendar for people who believe in Islam for religious reasons.

Baidu encyclopedia-lunar calendar