Why are there two April leaps in 2020?

According to the algorithm of "19 year seven leap method" in China lunar calendar, 2020 is a leap year, with 384 days in a year.

1. What is a leap year?

Gregorian calendar 2020 is a leap month, and February has 29 days. The algorithm of leap year in Gregorian calendar is very simple. Every four years is a leap year, which coincides with the time of the Summer Olympic Games. The last leap year was the 20 16 Rio Olympic Games in Brazil, and this leap year was the 2020 Tokyo Olympic Games in Japan. The scientific explanation of leap year is also very simple. The actual period of the earth's orbit around the sun is 365 days, 5 hours, 48 minutes and 46 seconds, while we usually only have 365 days a year. In order to reflect the correct time period, we artificially stipulate that every four years is 5 hours, 48 minutes and 46 seconds multiplied by 4, which is about one day and becomes 366 days.

China lunar leap year should be correctly called leap month year. According to the lunar calendar algorithm, the number of days in each month is calculated according to the number of days in monthly deficit, which is about 1-2 days less than that in the public and10-1354 days less than that in the Gregorian calendar in a year. The added month is a leap month, but it has not actually become 13 months. It just repeats the same month after February to 10 month. In 2020, the repeated month happens to be April, which becomes leap April.

Two, nineteen years seven leap month method

According to the China lunar calendar, every month should be neutral, and a month without neutral will become a leap month in the previous month. The so-called neutral atmosphere refers to the 24 solar terms, which are called solar terms at the beginning of the month and neutral atmosphere after the middle of the month. Generally, there are rain, vernal equinox, Grain Rain, summer solstice, intense heat, light snow, winter solstice and severe cold. 19 has seven months without neutral atmosphere, and these months without neutral atmosphere just become leap months. Leaping April is not uncommon around 2 1 century, and it usually occurs once every 8 years or 1 1 year. In 2020, the year of the rat happens to be April.

Third, the influence of leap April

Many netizens joked that there will be an extra month's work in 2020, but it is not, because our daily life is calculated according to the Gregorian calendar, and there will be an extra day's work in February. The lunar calendar is just an application of seasonal changes and traditional festivals in our daily life.