What is 99 solar terms? What is 99 solar terms?

1 and Jiujiu are Double Ninth Festival.

2. The ninth day of the ninth lunar month, also known as September 9th. In ancient times, "nine" was often used as the yang number, and September 9 was 29 heavy, so it was called "Chongyang". It is also called "Double Ninth Festival", because both the date and the month conform to nine. Returning to the truth of 1999, the ancients thought that 1999 Chongyang was an auspicious day. On the Double Ninth Festival, it is essential to climb high and look far, enjoy chrysanthemums and drink alcohol, eat double ninth cake and insert dogwood.