“双节”同辉！3年后中秋国庆将再次“喜相逢”

Group 1 - The occurrence of the Mid-Autumn Festival coinciding with National Day is a normal calendrical phenomenon, with the last occurrence in 2020 and the next one expected in 2028 [5] - The Mid-Autumn Festival can fall on any date between September 7 and October 8 in the Gregorian calendar, depending on the lunar calendar's leap months [2] - The lunar calendar's average year length is aligned with the solar year by adding leap months, which occurs seven times in a 19-year cycle [1] Group 2 - The current lunar year is a leap year, which has resulted in the Mid-Autumn Festival being pushed back to October 6 this year, compared to September 17 last year [1] - The next occurrence of the Mid-Autumn Festival on October 6 will not happen again until 2063 [5]