August festivals, solar terms, the origin of festivals, and the gods of popular science knowledge help.

August 1: Army Day of China People's Liberation Army1927 In August, Nanchang Uprising, the People's Army was born. August 15th: The Mid-Autumn Festival has a long history. Like other traditional festivals, it develops slowly. The ancient emperors had a system of offering sacrifices to the sun in spring and the moon in autumn. As early as in Zhou Li, the word "Mid-Autumn Festival" was recorded. Later, aristocratic scholars followed suit. During the Mid-Autumn Festival, they watch and worship the bright and round moon in the sky to express their feelings. This custom spread to the people and formed a traditional activity. Until the Tang Dynasty, people paid more attention to this custom of offering sacrifices to the moon, and the Mid-Autumn Festival became a fixed festival. Emperor Taizong recorded the Mid-Autumn Festival on August 15, which was very popular in the Song Dynasty. The ninth day of September: Double Ninth Festival was mentioned as early as the Spring and Autumn Period and the Warring States Period. Qu Yuan's Journey wrote: "Set Chongyang into the Emperor's Palace and see the capital of Qing Dynasty ten days later." The "Double Ninth Festival" here refers to the sky, not just festivals. In Nine Days Zhong You written by Cao Pi, Wei Wendi in the Three Kingdoms period, it was clearly written that the Double Ninth Festival: "From the year to the month, I suddenly returned to September 9. Nine is the number of yang, and the sun and the moon coincide. It is well known and considered suitable for a long time, so it is a feast. " Tao Yuanming, a scholar in Jin Dynasty, said in the preface to the poem "Idle for Nine Days": "I am idle and love the name of Nine. Autumn chrysanthemums are full of gardens, but they are sad, empty for Jiuhua, and precious words are like gold. " Chrysanthemum and wine are mentioned here at the same time. Probably in the Wei and Jin Dynasties, there was a custom of drinking and enjoying chrysanthemums on the Double Ninth Festival. In the Tang Dynasty, Chongyang was officially designated as a folk festival. In the Ming Dynasty, on the Double Ninth Festival in September, the palace would eat flower cakes together to celebrate, and the emperor would personally climb the Long Live Mountain to celebrate his autumn ambition. This custom has been passed down to the Qing Dynasty. August 1: China People's Liberation Army Day (1927) August 5: Engles' death anniversary (1895) August 6: International Film Festival (1932) August 8: National Fitness Day (1988 2nd: International Youth Day (1999) August13rd: International Left-handed Day (1976) August15th: Japan officially announced the unconditional surrender day (1945) August 22nd: Deng Xiaoping's birthday.