What does it mean to wait for a leap month for ten years, and what year is a leap month?

The leap months are 208, 360, 379, 436, 629, 648, 667, 724, 906, 982, 1058, 1153, 1202, 1221, 1335, 1411, 1422;

The years 1430, 1517, 1525, 1536, 1574, 3358, 3472, 3806, 3988, 4751, and 4941 all had intercalary Decembers.

China's lunar calendar (commonly known as the summer calendar) is a lunisolar calendar - its average time of year is equal to the return year (about days), and the average time of a month is equal to the synodic month (about days). However, in the calendar, the number of days in the year and month must be integer, so each month has to take 30 days in the big month and 29 days in the small month. In this way, the 12 months of the lunar calendar are only 354 or 355 days (353 days in the very juvenile case), which is on average more than 11 days worse than the return year.

How to solve this problem? Our ancestors used the leap month method to solve the problem.

More than 2,000 years ago, the method of adding 7 leap months every 19 years began to be used (a rule that still holds approximately true today). Thus, a year with a leap month has 13 months.

When a leap month is needed, which leap month is it? There are also strict rules on which month there are only solar terms (Lichun, Jingjing, Qingming......).Xiaohan) without the middle air (rain, vernal equinox, valley rain......Great Cold), which month is considered a leap month.

The Earth's orbit around the Sun is not uniform. According to Kepler's law of celestial motion, the Earth's orbit around the Sun is elliptical, and the Sun is at a focal point of the ellipse; And the Earth runs fastest near perihelion and slowest near aphelion.

The position of the Earth at the time of the winter solstice, spring equinox, summer solstice, and autumn equinox.

The setting of the 24 solar terms in China is also in line with Kepler's law, in the 24 solar terms, the interval between the two adjacent solar terms is not equal, the interval between the two adjacent solar terms before and after the summer solstice is close to 16 days, and the interval between the two adjacent solar terms before and after the winter solstice is only more than 14 days. This makes it difficult to appear around the winter solstice in months with only solar terms and no mid-terms. Therefore, the chances of a leap month, a leap month, and a leap month of November are very low.

Even if it is a leap month, there can only be one Spring Festival - the first day of the first month (the first day of the year) is the Spring Festival. Similarly, there can only be one Chinese New Year's Eve – the last day of the year is Chinese New Year's Eve. Therefore, even if it is a leap month, there cannot be two Spring Festival holidays, and it is impossible to have two holidays!

It is a good wish to live two more leap months, and the ancients had the dream of immortality. Find Taishang Laojun and ask for an elixir of immortality!

Leap New Year is very rare.

The leap month is a very rare calendar phenomenon. The wax moon is the last month of the year, whether it is flat or intercalary. The month of Wax (leap) refers to the twelfth month of the leap month, that is, the thirteenth month of the year is the leap month, and it is also the situation of the month of Wax.

In order to keep the lunar calendar in sync with the return year of the Gregorian calendar (solar calendar), the ancients used the method of setting leap months to solve the problem. Since the time of the Xian calendar, the use of Dingshuo to determine the qi, near the perigee (near Xiaohan), the time between the two middle qi is less than 30 days, so there are fewer leap months, among which the leap month and the first month of the leap month are very rare.

The intercalary month is the rarest of all leap months, and there were no intercalary months from the 17th century until the 33rd century (but not statically, and the frequency of leap months gradually increased from the lowest over time), and there were no intercalary months in the 36th and 38th centuries, 41st and 47th centuries and 49th centuries. The last intercalary month appeared in the 16th century--- 1574 [Jiaxu year]. The next leap month occurred in the 34th century--- 3358 [Wuwu year].

Origin of the leap month:

In 104 BC, Emperor Wu of the Han Dynasty felt that the pre-Qin calendar had many shortcomings. The lunar calendar is based on the synodic cycle of the moon, the month is 30 days larger, the month is 29 days smaller, and the twelve months are about 354 days. So he ordered the establishment of a new calendar, the "primordial calendar", and placed the leap month on the fourth hour.

The twenty-four solar terms are based on the position of the earth in one revolution around the sun, every 15° of movement, and their dates are basically fixed. The intercalary month is based on the twenty-four solar terms. The twenty-four solar terms are actually a collective term for the 12 solar terms and the 12 qi, and the qi refers to the middle qi.

The method of intercalation is between the two winter solstices, if there are only 12 months, there is no intercalation, if there are 13 months, i.e., intercalation. The intercalary month begins with the "winter solstice", and when the first month without "Zhongqi" appears, then this month is a leap month, and its name is to add the word "intercalary" to the previous month.

According to the lunar intercalation method of "seven leaps in 19 years", there is almost 1 leap every year.

For example, in 2017, there were 13 months in the lunar calendar. In the month after the sixth month of the lunar calendar, there is only one solar term, "the beginning of autumn", and there is no mid-term, which is the leap June. As a traditional calendar in China, the lunar calendar is actually a combination of the movement of the moon and the sun, which is a lunisolar calendar.

The leap months are 208, 360, 379, 436, 629, 648, 667, 724, 906, 982, 1058, 1153, 1202, 1221, 1335, 1411, 1422;

The years 1430, 1517, 1525, 1536, 1574, 3358, 3472, 3806, 3988, 4751, and 4941 all have leap December.