春节为何“忽早忽晚”？专家回应

Core Viewpoint - The article discusses the phenomenon of the Chinese New Year (Spring Festival) occurring at varying times each year, primarily due to the concept of "leap months" in the lunar calendar, which is used to reconcile the differences between the lunar and solar calendars [1][3]. Group 1: Leap Month Explanation - The lunar calendar, which is a traditional Chinese calendar, is based on the moon's cycles, resulting in a year of approximately 354 days, which is about 11 days shorter than the solar year of approximately 365 days [3][4]. - To balance the time difference between the lunar and solar calendars, ancient Chinese people introduced leap months, occurring roughly every two to three years, to ensure that the lunar calendar aligns more closely with the solar calendar [4][6]. Group 2: Impact on Chinese New Year Timing - The introduction of leap months causes variations in the timing of the Chinese New Year, which is closely tied to the lunar calendar [4][6]. - For instance, in 2025, a leap month will result in a lunar year of 384 days, causing the Chinese New Year in 2026 to be delayed until February 17, while the absence of a leap month in 2026 will lead to an earlier Chinese New Year in 2027 [6]. - The earliest Chinese New Year in the 21st century has been recorded on January 21, while the latest has been on February 19, indicating a one-month variation [6].