Is 2020 a leap year? What month is it now?

Lunar leap month runs once every three years, twice every five years, and 19 runs seven times!

The lunar calendar has several names, the lunar calendar and the monthly calendar. Because Bian Xiao is a farmer, he is down to earth. The following are all called lunar calendar.

What month is the lunar leap month? It depends on the 24 solar terms in a year.

The lunar calendar takes the moon as the cycle (lunar calendar), and the December calendar is about 354 days. Combined with the almanac (solar calendar), the almanac is compiled according to the four-season cycle formed by the revolution of the earth. The monthly calendar is shorter than the annual calendar by 1 1 day. Therefore, it is necessary to add 7 leap months every 19 years to make up for the error. Deciding which month is a leap month depends on 24 solar terms. Lunar months usually include a solar term and a neutral atmosphere, such as the autumnal equinox. If a lunar month has only solar terms but no neutral atmosphere, one more month will be added to the calendar as a leap month. Taking 2006 as an example, July of the lunar calendar happened to be a month with solar terms but no neutral atmosphere, so there was an adjustment error in July.

The date of the twenty-four solar terms of the lunar calendar is postponed month by month, so in some lunar months, the gas falls at the end of the month, and it will be out of gas next month.

Generally, there will be a month without gas every two years, which coincides with the year when leap months are needed. Therefore, the lunar calendar stipulates that non-neutral months are leap months.

For example, April 29th of the 200 1 lunar calendar is full of breath, and the first day of every other month is the solstice of the next summer. If there is no gas this month, it will be a leap month, after April, so it is called leap April.

Explain it again, Bian Xiao is not clear, and quickly summarize:

To sum up, when a month is out of breath, it will leap in that month, so there is no fixed rule for which month to leap.

Blessed are the children born in leap months. Whether you want to have your next birthday or not depends on fate. You may not be able to have your next birthday in 60 years.

Lunar leap moon table

1949 leap July 1952 leap may 1955 leap March 1957 leap August 1960 leap June 1963 leap April1963 leap April. Leap April 1976 leap August 1979 leap June 1982 leap April 1984 leap October 1987 leap June 1990 leap may/kloc- Leap April 2004 Leap February 2006 Leap July 2009 Leap 20 12 Leap 20 14 Leap 20 17 Leap June 2020 Leap April.

Although everyone knows the leap year algorithm of the solar calendar, Bian Xiao still needs to talk about it again.

Accurate calculation method of leap year in solar calendar: (according to a tropical year, 365 days, 5 hours, 48 minutes and 45.5 seconds)

1. It is divisible by 4, but not by 100.

2. divisible by 400.

The rules for judging leap years in the solar calendar are: leap every four years, not leap in a hundred years, and leap again in four hundred years.

Lunar calendar and leap month

In the China lunar calendar, a year with a leap month is called a leap year. The general year is 12 months, 354 or 355 days, and the leap year is 13 months, 383 or 384 days. As a kind of lunar calendar, the number of days in each month depends on the monthly loss, and the time of one year is based on 12 months. In order to close the earth's cycle around the sun, that is, the tropic year, one month is added every two to four years, and the added month is a leap month, so the leap year of the lunar calendar is 13 months.

A leap month is a way to set a leap day in a calendar. In Asia (especially in China), leap month refers to one month added every leap month year in the Han calendar (also called lunar calendar) (in order to coordinate the contradiction between tropic year and the Han calendar year and prevent the tropic year from being out of touch with the four seasons of the Han calendar year, 1 leap is set every two to three years. 19 leap week was used in ancient times, and Linde calendar was abolished in Tang Dynasty. Sometimes leap month also refers to the month that contains leap day in the leap year of Gregorian calendar (that is, February of Gregorian leap year).

Leap month calculation method

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.

So how often do you add leap months? The best way is to find the least common multiple of the number of days in the tropical year and the number of days in the lunar month: we hope that the number of days in m tropical years is equal to the number of days in n lunar months, that is, there should be an equation:

m×365.2422=n×29.5306

In this equation, we can't find M and N directly, but we can see their relationship, which explains that 19 tropic year must add 7 leap months.