How did the leap April in 2020 come about? Why do we need parents’ shoes for the leap April?

How did the leap April in 2020 come about? Why do we need parents’ shoes for the leap April?
Introduction: Leap April is a special month, so how did the leap April of 2020 come about? Why do we need parents’ shoes in leap April? After Grain Full in 2020, a special month (leap April) will come. For the specific content analysis of leap April, please pay attention to the special topic about leap April 2020 on Shuimoxiansheng.com!

How did the leap April in 2020 come about?

The 24 solar terms start from the Beginning of Spring. The odd-numbered solar terms are called "festivals" (Beginning of Spring, Waking of Insects, Pure Brightness, Beginning of Summer, Grain in Ear, Lesser Heat, Beginning of Autumn, White Dew, Cold Dew, Beginning of Winter, Heavy Snow, Lesser Cold) and the even-numbered solar terms are called "Central Solar Terms" (Rain Water, Vernal Equinox, Grain Rain, Grain Full, Summer Solstice, Greater Heat, End of Heat, Autumnal Equinox, Frost Descent, Light Snow, Winter Solstice, Greater Cold).
The average time between two solar terms is 365.2422÷12=30.4368 days, which is 30 or 31 days. The Earth's orbit around the sun is elliptical, and it moves faster at the perihelion (vernal equinox and autumnal equinox). The time interval between two solar terms can be up to 31.45 days. The average length of a lunar month is only 29.5306 days, with a short lunar month lasting 29 days and a long lunar month lasting 30 days. This results in the following situation: in some months (usually short months), the previous solar term has passed at the beginning, and the next solar term has not yet arrived at the end. For example, in 2001 (the Year of the Snake), Grain Full fell on May 21 (the 29th day of the fourth lunar month), and the first day of the next lunar month was May 23, which had missed Grain Full. However, this lunar month ended on June 20, and the summer solstice was on June 21, so this lunar month had no "Zhongqi" and fell after the fourth lunar month, so it was called a leap April. According to this leap month rule, there is a leap July in 2006, a leap May in 2009, a leap April in 2012, a leap September in 2014, a leap June in 2017, a leap April in 2020, and a leap February in 2023.

Why do we need parents’ shoes in leap April?

Leap month shoes are a folk custom in China. In leap months of leap years in the lunar calendar, children should buy a pair of shoes for their parents to repay their parents for their care and to pray for their parents' health and safety.
In some areas, in leap year, married daughters have to buy a pair of shoes for their mothers. Leap month shoes must be worn in the previous month to be effective.
"Leap month shoes, worn in the leap month, the leap month old man will live to be a thousand years old." According to folk saying, in leap years and leap months, children should buy a pair of shoes for their parents to repay their kindness in raising them and to pray for their parents' health and safety.

——On the calculation of leap month

The calculation of leap years and leap months in the lunar calendar is that there is one leap year every three years, two leap years every five years, and seven leap years every 19 years. The lunar calendar basically has a cycle of 19 years, which corresponds to the same time in the Gregorian calendar.
For example, May 27, 2001, May 27, 1982 and May 27, 1963 in the Gregorian calendar are all the fifth day of the fourth month in a leap year.
The month to which the leap month is added is determined according to the rules of the lunar calendar, mainly based on the correspondence with the 24 solar terms of the lunar calendar.
The number of days in a leap month in the lunar calendar is the same as that in a normal month, which is 29 or 30 days.
The so-called "leap year" in the lunar calendar only refers to leap year and leap month, while the Gregorian calendar also has the term leap year.

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