Why is the Double Ninth Festival on the lunar calendar different from the Gregorian calendar every year?

It is also the Double Ninth Festival. Why is the Double Ninth Festival different from the Gregorian calendar every year? Double Ninth Festival is a festival in the current lunar calendar in China. The number of days in the lunar year is less than that in the return 1 1 day. Three years later, it was less than 1 month. Over time, there will be disorder of time sequence and season.

In order to solve this problem, the method of adding "leap month" is adopted, which is "7 leap years of 19", that is, adding 7 leap years to the lunar year of 19. Astronomical experts said that due to the ingenious arrangement of "leap month" in China calendar, the Gregorian calendar date corresponding to the Double Ninth Festival is always about 1 1 day earlier or about 19 days later. Not only the Double Ninth Festival, but also any fixed day of the lunar calendar will have a swing similar to the solar calendar.

The Double Ninth Festival has a history of more than 65,438+0,000 years in China, also known as Double Ninth Festival, Cornus officinalis Festival, Chrysanthemum Festival, Ascending Festival, Seniors Festival and Respect for the Elderly Festival. The Law on the Protection of the Rights and Interests of the Elderly, which was implemented on July 20 13, clearly stipulates that the ninth day of the ninth lunar month is the National Day for the Elderly.

"Since ancient times, the Double Ninth Festival has symbolized peace, harmony, health and longevity." With the development of the times, the Double Ninth Festival has gradually been given new meanings. The Double Ninth Festival has become a national statutory holiday, which reflects the country's concern and attention to the elderly and is also an appropriate measure to actively deal with the aging population. At the same time, it also makes more young people aware of the importance of family ties and inherits "the filial piety of all virtues comes first". "Respecting the elderly is an important symbol of social civilization and harmony and should be widely valued and promoted."