What month is the leap month in Gregorian calendar 1963?

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During the Spring and Autumn Period and the Warring States Period, three calendar systems were used in different regions, namely, the summer calendar, the lunar calendar and the weekly calendar. The main difference lies in the different monthly construction at the beginning of the year. The twelve months in a year are Zi Yue, Ugly Yue, Yin Yue Yue, Mao Yue Yue, Chen Yue Yue, Si Yue Yue, Wu Yue Yue, Shen Yue Yue, You Yue, Yue Yue and Hai Yue. Among them, the winter solstice (mid-winter month) is a sub-month, the big cold month (winter month) is an ugly month, the rainy month (spring month) is silver moon, and so on.

In the summer calendar, silver moon is the first month (the same as the first month of the current lunar calendar), in the lunar calendar, the ugly month (equivalent to1February of the current lunar calendar) is the first month, and in the weekly calendar, the sub-month (equivalent to1month of the current lunar calendar) is the first month. The traditional calendars we use today are the summer calendar, also known as the lunar calendar and the lunar calendar. This calendar has twenty-four solar terms to guide agricultural activities, determines the months with strict lunar cycle, and makes the average length of a year close to the tropic year by setting leap months, which has the nature of both lunar and solar years, so it is essentially a combined calendar.

The lunar calendar takes the date when the sun and the moon meet (the ecliptic of the sun and the moon is equal) as the first day of a month, that is, the first day. The average length of the new moon is about 29.53059 days, so some months are 30 days, which is called big moon; Some months are the 29th, which is called abortion. The date of the beginning of the month should be calculated according to the position of the sun and the moon, not arranged mechanically. The lunar calendar takes 12 months as a year, with a total of 354 or 355 days, which is about 1 1 day different from the tropical year. Therefore, a leap month will be inserted every three years, and another leap month will be inserted two years later, with an average of seven leap months in 19 years.

In which month to insert the leap month, it needs to be determined according to the 24 solar terms closely related to the season and climate. A tropical year is divided into 24 solar terms. If twenty-four solar terms are discharged from beginning of spring to severe cold, then odd numbers are called solar terms and even numbers are called qi. The name of the lunar month depends on "Zhong Qi". For example, the month with "rain" is called the first month and the month with "vernal equinox" is called February. Twelve months of a year are represented by twelve neutral gases, and the average value between the two neutral gases is 365.2422÷ 12=30.4368 days, then 30 or 3 1 day, which is nearly one day more than a new moon.

The earth's orbit around the sun is elliptical, and it runs very fast at the perihelion (vernal equinox and autumnal equinox), and the interval between two solar terms can be as long as 3 1.45 days. On the other hand, the average new moon in the lunar calendar is only 29.5306 days, the small moon in the lunar calendar has 29 days and the big moon has 30 days. In this way, there will be such a situation: in some months (usually abortion), the last breath has passed at the beginning and the next breath has not come yet at the end. So this lunar month without neutrality is called the leap month of last month. For example, 200 1 (Xinsi year of the snake), Xiaoman is on May 21(April 29), and the first day of the next lunar month is May 23. However, this lunar month ends on June 20, and the summer solstice falls on June 2 1 day, so this lunar month is not neutral, it is after April of the lunar calendar. According to this leap law, leap in July 2006, leap in May 2009, leap in April 20 12, leap in September 2022, leap in June 2022, leap in April 2022 and leap in February 2023.

This year's leap April has only one solar term, but there is no breath. This "leap April" begins on May 23rd and ends on June 20th in the solar calendar. This month has 29 days. Setting leap months in this way can make the difference between calendar months and solar terms not too big.

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Source: Xinhua News Agency China Big Database

The above is related to the leap month in 1963, and it is about the sharing of April in the lunar calendar. After watching the leap month of 1963, I hope this can help everyone!