闰 正月 : 闰 正月 is an extremely rare 闰月, 闰 正月 is 闰 January. According to the "History of Song", Wenyan Boping's uprising of the King of Beizhou was to conquer the first month in 1048 AD in the eighth calendar year. The first normal moon appears in the 16th century (Gengchen year) in the 17th century, and the next normal month will appear in the year 2262 (the year of Ren Yin) in the 23rd century. Historical records did not show any 闰 正月 from the 18th to the 22nd centuries, and in the subsequent 25th and 28th to 41st centuries, 闰 闰月 did not appear. Judging from the solar terms of the year, the year of the Lunar New Year must be the earliest year of the Spring Festival.