There are two beginning of spring in history.

1, Gregorian calendar year 2004, Shen Jianian, 14th day of the first month in beginning of spring; Beginning of spring again on the 26th of the twelfth lunar month.

2. Gregorian calendar year 2006, Xu Bingnian. Beginning of spring on the seventh day of the first month; On the seventeenth day of the twelfth lunar month, beginning of spring again.

3. Gregorian calendar year 2009, ugly year, beginning of spring on the seventh day of the first month; Beginning of spring again on the 21st of the twelfth lunar month.

4. Gregorian calendar 20 12, the year of Nonchen, the thirteenth day of the first month in beginning of spring; Beginning of spring again on the 24th of the twelfth lunar month.

5. Gregorian calendar 20 14, Wu Jianian, beginning of spring on the fifth day of the first month; Beginning of spring again on the 16th of the twelfth lunar month.

The double spring year means that there are two solar terms in beginning of spring in a year. The double spring year is a unique phenomenon in Chinese calendar, which is actually caused by the "wrong balance" between 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 1 is 1 year, divided into 12 months, and counted as 365 days. The lunar calendar is based on the law of the moon's profit and loss. The orbit of the moon around the earth is 1 month, and a year is 12 months. The actual number of days is 354 days.

China's calendar is based on the cycles of the sun and the moon. In this way, there is a deviation of 1 1 day between the lunar calendar and the solar calendar, so the lunar calendar has a "leap month" to solve the time difference problem of the lunar calendar.

As the saying goes, double spring is a leap month and a good year for marriage. China also has a saying: beginning of spring has the meaning of second spring twice, so it is not suitable for marriage. In fact, "double spring" and "no spring" are the results of the arrangement that must be "set right" between the solar calendar and the lunar calendar. And "no spring" or "double spring" is also the result of artificial arrangement, which has nothing to do with fortune.