公历日期不固定，农历春节有讲究（信息服务台）

Group 1 - The Spring Festival in 2026 will be on February 17, which is the latest date in recent years, being 19 days later than in 2025 [1] - The Spring Festival dates fluctuate due to the differences between lunar and solar calendars, with the lunar calendar being based on the moon's phases and the solar calendar based on the sun's position [2][3] - The lunar calendar has an average of 354 days in a common year and 384 days in a leap year, leading to variations in the Spring Festival date by approximately 11 days earlier or 19 days later each year [3] Group 2 - Other lunar festivals, such as the Dragon Boat Festival and Mid-Autumn Festival, also experience similar fluctuations in their corresponding solar calendar dates [4] - The lunar calendar is closely tied to agricultural production in China, utilizing the 24 solar terms, which are based on the solar year, to guide farming activities [5]