National Day is a statutory holiday established by a country to commemorate the country itself. They are usually the independence of the country, the signing of the constitution, the birthday of the head of state, or other anniversaries of great commemorative significance; some are also Saints' Day, the patron saint of the country. In ancient China, the emperor's enthronement and birthday were called "National Day". Today, China's National Day refers specifically to October 1, the anniversary of the official founding of the People's Republic of China.

It is said that the year of the Gengzi is unusual. The Mid-Autumn Festival and the National Day are on the same day. Why is this so? Astronomy professionals have pointed out that this kind of situation is mainly due to the reason of the leap month: my country's lunar calendar stipulates that the big month has 30 days, the small month has 29 days, and a year and 12 months total 354 or 355 days, which is 11 days less than the number of days in a tropical year. Up and down the world, after four years, there is more than one month missing. Over time, the strange phenomenon of disordered timing and time of day will occur. "If the intercalary month of the lunar calendar is added before August, most of them will cause a 'happy meeting' on the Mid-Autumn Festival and National Day." Astronomy professionals also pointed out that the Mid-Autumn Festival and the National Day are a normal calendar phenomenon, but the Mid-Autumn Festival and the National Day are on the same day. God! It is still very rare. In 1982, in 2001, the Mid-Autumn Festival and the National Day were on the same day, and then this year.

Autumn is high, autumn frost, and autumn coincides with the Mid-Autumn Festival. It is a good day again tonight. In this golden autumn lunar August, the Mid-Autumn Festival and the National Day are ushered in. The National Day and the whole world celebrate the Mid-Autumn Festival.