How to calculate the date in beginning of spring?

Interpretation of the formula: the last two digits of the number of years are multiplied by 0.2422 plus 3.87, and the whole number is subtracted from the number of leap years. 2 1 century c value =3.87, and in the 22nd century c value =4. 15.

For example, the calculation steps of beginning of spring date in 2058 are [58× .0.2422+3.87]-[(58-1)/4] =17-14 = 3, so beginning of spring date is February 3.

Spring Festival happens to be in beginning of spring: (1645-2800)

1685 1704 17 15 1734 1753 1772 18 10 1829 1886 1905 / kloc-0/924 1943 65438+ 0992 2038 2087 2 106 2 144 220 1 2220 2258 2296 23 15 2326 24 1 0 2440 2459 2478 2535 2554 2592 26 1 1 2630 2649 2668 2687 2706 2763 2782 280 1

New Year's Eve coincides with beginning of spring Day: (1645-2800)

1647 1666 1723 1742 1780 1799 18 18 1837 1848 1867 1 932 1962 1986543 8+0 2000 20 19 2057 2076 2 133 2 152 2 17 1 2239 2285 2323 2334 2353 2372 239 / kloc-0/ 2429 2448 2467 2505 2524 2543 2562 2573 2657 2725 2744