Formula: [Y*D+C]-L Key: Y refers to the last two digits of a year, such as 10 in 2010, 08 in 2008, D = 0.2422, L = the number of leap years, 21st Century C = 3.87, 22th Century C = 4.15.

Example: The first day of Start of Spring in 2058 = [58 × 0.2422 +3.87] - [(58-1) / 4] = 17-14 = 3, so Start of Spring starts on February 3.

The Spring Festival coincides with the first day of Start of Spring in the following years: （1645年－2800年）

1685 1704 1715 1734 1753 1772 1810 1829 1886 1905 1924 1943 1992 2038 2087　2106 2144 2201 2220 2258 2296 2315 2326 2410 2440 2459 2478 2535 2554 2592 2611 2630 2649 2668 2687 2706 2763 2782 2801

New Year’s eve coincides with Start of Spring in the following years: （1645年－2800年） 1647 1666 1723 1742 1780 1799 1818 1837 1848 1867 1932 1962 1981 2000 2019 2057 2076 2133 2152 2171 2239 2285 2323 2334 2353 2372 2391 2429 2448 2467 2505 2524 2543 2562 2573 2657 2725 2744

Source: baike.baidu.com