What are the years of widowhood mentioned in folklore in the next 10 year?

China had the method of "seven leap months in nineteen years" more than two thousand years ago, that is, seven leap months were inserted into 19, so that the leap year of the lunar calendar had 383 or 384 days, about 19 days more than the solar calendar. The solar terms in beginning of spring are basically set on February 4th of each solar year, so there are two beginning of spring in the leap month of the lunar calendar, and there are no beginning of spring in some normal years. So, how old is the widow?

In fact, the emergence of "no spring year" (widowed year) and "double spring year" is caused by the "wrong day" of the solar calendar and the lunar calendar. The solar calendar is based on the law that the earth revolves around the sun. The revolution of the earth is 365.24 days. One year 12 months. According to the date of the solar calendar, we can clearly see the changes in temperature and warmth throughout the year. The lunar calendar is based on the law of the moon's profit and loss. The moon goes around the earth once in January, and a year is twelve calendar months. Twelve lunar months have about 354 days.

The calendar of our country is a kind of yin-yang calendar, which is formulated in combination with the sun-moon cycle. A year is divided into 24 solar terms according to the movement of the sun, and months according to the movement of the moon, and a leap month is added to solve the time difference between the lunar calendar and the solar calendar. As a result, some years have thirteen months in a year. In this way, the solar terms in beginning of spring may appear in the twelfth month of last year or the first month of next year, resulting in "no spring" years (few years) and "double spring" years. [2]

From the astronomical point of view, the existence of beginning of spring is only caused by the "quirk" between the lunar calendar and the solar calendar. The solar calendar is based on the law that the earth revolves around the sun. The earth rotates once a year, which is 365.24 days. The lunar calendar is formulated according to the law of the moon's profit and loss, and there are flat years and leap years. A normal year has 354 or 355 days.

China had the method of "seven leap months in nineteen years" more than two thousand years ago, that is, seven leap months were inserted into 19, so that the leap year of the lunar calendar had 383 or 384 days, about 19 days more than the solar calendar.

The solar terms in beginning of spring are basically set on February 4th of each solar year, so there are two beginning of spring in the leap month of the lunar calendar, and there are no beginning of spring in some normal years. The law of "single spring" also roughly follows the period of 19 years.

That is to say, there will be no beginning of spring for 7 years out of every 19 years, with an average of once every two or three years. 19 has seven "double spring years" and five "single spring years".

It can be seen that "no spring" after "double spring" is completely the result of calendar arrangement according to certain rules, and it often appears.

There is no "beginning of spring" in the whole year, and 19 will appear seven times. For example, 199 1 Year of the Sheep, 1994 Year of the Dog, 1997 Year of the Ox, 1999 Year of the Rabbit, 2002 Year of the Horse, 2005 Year of the Rooster, 2008 Year of the Rat and 20/kloc-

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