Catalogue of Tomb-Sweeping Day's Mathematical Manuscripts

The contents of Tomb-Sweeping Day Mathematical Manuscripts include the founding time of Tomb-Sweeping Day, the nickname of Tomb-Sweeping Day, the significance of Tomb-Sweeping Day, the climate characteristics of Tomb-Sweeping Day and the origin of Tomb-Sweeping Day.

1. Established in Tomb-Sweeping Day: Tomb-Sweeping Day was established as a national statutory holiday in 2008. On May 20th, 2006, this folk festival was approved by the State Council to be included in the first batch of national intangible cultural heritage list. Tomb-Sweeping Day is an important traditional folk festival in China, and it is one of the eight important festivals: Shangyuan, Qingming, Long Summer, Dragon Boat Festival, Central Plains, Mid-Autumn Festival, Winter Solstice and New Year's Eve.

2. Tomb-Sweeping Day's nickname: Tomb-Sweeping Day, also known as Youth Day, Youth Day, March Day, ancestor worship day, etc. It was celebrated at the turn of mid-spring and late spring. Tomb-Sweeping Day is the biggest ancestor worship festival of the Chinese nation, which originated from ancestors' beliefs and customs of worshipping spring.

3. Significance of Tomb-Sweeping Day: Tomb-Sweeping Day is a traditional major Spring Festival. It is a fine tradition of the Chinese nation since ancient times to sweep graves to worship ancestors. It is not only conducive to promoting filial piety, awakening family memories, but also conducive to promoting the cohesion and identity of family members and even the nation.

4. Climatic characteristics of Tomb-Sweeping Day. Qingming is a solar term representing phenology, which means sunny weather and lush vegetation. As the saying goes, "Qingming breaks snow, Grain Rain breaks frost." When the weather is clear, the climate in South China is warm and the spring is strong.

5. Origin of Tomb-Sweeping Day: The traditional Tomb-Sweeping Day in China began in the Zhou Dynasty and has a history of more than 2,500 years. Tomb-Sweeping Day is first of all a very important solar term. As soon as Tomb-Sweeping Day arrives, the temperature rises, which is a good season for spring ploughing and planting. Therefore, there is a saying that "melons and beans are planted before and after Qingming".