Leap occurs once in August of several years.

Leap August is a leap month with medium frequency, which is second only to leap April, leap June and leap July. Generally, it occurs once every 19 years (such as 1957 and 1976), and sometimes it occurs once every 8 years (such as 2454 and 2462) or 165438.

When there is an interval of 38 years (such as 1680, 17 18) or a multiple of 19 (such as 2845,2921year, with an interval of 76 years, 76 is/kloc-0). Another example is 2462 and 2557, the difference is 95 years, 95 is 5 times of 19), and one is greater than 19, but the difference is not more than 38 years (for example, 2796 and 2826, the difference is 30 years).

What's more, it is 100 years or more (for example, 17 18, 185 1 year, 133 is 19).

Extended data:

The origin of leap August

The calendar adopted in China since 19 1 1 is a general calendar, commonly known as the solar calendar. The earth revolves around the sun for one year; The traditional lunar calendar in China, commonly known as the lunar calendar, takes the cycle of the moon as the unit for calculating time. The earth goes around the sun once, and the temperature changes once. So the solar calendar is 365 days a year, which is consistent with the change of hot and cold.

The lunar calendar has 354 days a year, which is different from the solar calendar by 1 1 day, so it is adjusted by leap month. The error of 8 years is nearly a quarter, and the error of 16 is half a year. Setting leap month can not only accurately reflect the changes of cold and summer, but also ensure the relative stability of gas changes throughout the year.

According to the current leap system, August in the lunar calendar must include the autumnal equinox, and September in the lunar calendar must include the first frost. If the leap August is not arranged, the first frost will appear on the first day of October.

As a result, the spring equinox, summer solstice, autumn equinox and winter solstice of 1996 will be in March, June, September and1February respectively, so that the solar terms of the lunar calendar will be completely disrupted. In order to avoid this situation, it is more appropriate to arrange a leap August in the lunar calendar 1995.

Baidu encyclopedia-leap in August