Group 1 - The article discusses the upcoming solar term "Lichun" (Beginning of Spring), which will occur on February 4 at 4:02 AM [5] - The date of "Lichun" varies each year due to the astronomical definition of solar terms, which are based on the sun's position along the ecliptic [6] - The average length of a tropical year is approximately 365 days, 5 hours, 49 minutes, leading to variations in the corresponding Gregorian calendar dates for solar terms [6][7] Group 2 - The article explains that if two consecutive years have the same solar term separated by a common year, the solar term in the following year is delayed by about 5 hours and 49 minutes [7] - The current Gregorian calendar uses a leap year system to adjust for discrepancies with the tropical year, which can cause fluctuations in the dates of solar terms [7] - The article highlights that "Lichun" typically falls between February 3 and 5, while other solar terms also have similar date ranges [7]
【新华社】星空有约丨立春日期为啥“变来变去”？
Xin Hua She·2026-02-04 03:32