There are several June months between 1979 and 2079.

The year of leap month is leap February 1890, 1909, 19 17, 1928, 1947, 2004, 2023. Leap March 1860, 1879, 1898, 1936, 1955, 1966, 1993, 2003. Leap April 1849, 1868, 1887, 1906, 1925, 1944, 1963,/. Leap May 1857, 1865, 1876, 1884, 1895, 1903,19/kloc-. Leap in June 1873, 1892,191,1930, 194 1,/kloc-0. Leap July 1854, 188 1,19, 1938, 1949, 1968. Leap September 20th14. Leap October 1870, 1984. ★ Leap Moon: The lunar calendar used by China is actually a lunar calendar, mainly based on the movement cycle of the moon, that is, the lunar calendar; At the same time, the period of the earth around the sun, that is, the solar calendar, is considered As early as three or four thousand years ago, our ancestors used the pure lunar calendar and solar calendar harmoniously. This is indeed a clever invention of our ancestors. According to scientific determination, the time of a new moon is 29th 12: 44: 3, about 29.5306 days. A solar year is 365 days, 5 hours, 48 minutes and 46 seconds, about 365.2422 days. The length of the lunar calendar is calculated according to the period of the earth around the sun. If the lunar calendar is fixed at 12 months every year, there will be 29.5306 × 12 = 354.3622 days in a year, with a difference of about 10.879 days. If the Spring Festival is in winter this year, it will be celebrated in summer after16 (10.879×16 =174, which is equivalent to more than five months). Considering this, ancient astronomers compiled the lunar calendar, so that every day of every month contains the meaning of the moon phase. 19 solar year: 365.2422×19 = 6939.38+08; However, seven months after 19 lunar year, * * has (19× 12+7) = 235 moons, 235× 29.5306 = 6939.5438+00 days. In this way, the two are basically equal, and the months and seasons of the lunar calendar can be roughly coordinated for a long time, and there will be no inversion of cold and summer. The position of the lunar calendar is completely artificial. Different dynasties have different placement of runyue. Before the Qin Dynasty, there was a time when Runyue was placed at the end of a year, which was called "March". In the early Han Dynasty, Runyue was placed after September, which was called "the last September". In the first year of Emperor Taizu of Han Dynasty (BC 104), every month of the year was inserted with Runyue, which stipulated that the month without "neutral gas" was used as the Runyue of the previous month, and the word "Runyue" was added to the name of last month, which has been used ever since. In this way, the lunar calendar ran for thirteen months. In particular, the first month or two contains two neutral qi, and the last month, although there is no neutral qi, can not be regarded as a moist month. For example, in the first month of the lunar calendar (1985), there was only one solar term (fright) without neutral qi. Last year, there were two neutral qi (Jiazi, 1984) in1month. With such a regulation, 19 years can be exactly seven months. In the twelfth lunar month (twelfth lunar month), the earth is near the perihelion and moves faster, so there are fewer chances to leap into the moon. It is ok to have two Mid-Autumn Festival, but it is too difficult to have two "New Year's Eve". According to statistics (see the table below), from 1849 to 203 1, the jump is the most frequent in May. Leap in the first month, leap in November and leap in December did not happen; 20 14 September leap only happens once. It can also be seen from the statistical data that the distribution of leap months is irregular.