What is the emphasis on the fifteenth day of the first month?

The 15th Lantern Festival in Jacky is also called Shangyuan Festival.

During the period of Emperor Wu of the Han Dynasty, on the fifteenth day of the first month, the "Taiyi God" was sacrificed. "Zi Jian" records that the lantern was burned in the Yuan Dynasty, or the cloud fainted to the day with Taiyi in the Han Temple. People also think that Shangyuan Festival is a day when God bless the people, so lanterns should be held at 15 o'clock in the first month to pray for good luck. In addition, according to the folk custom, the first and fifteenth days of the first lunar month are to worship the heavens, and "burn incense to worship the ancestors". For example, after the Lantern Festival is completed, ancestors are worshipped, incense is burned, kowtows are made, blessings are prayed, and then the whole family is reunited to enjoy family happiness. The ancient folk custom is to offer sacrifices to Ce Shen Zigu on the 15th day of the first month, and to offer sacrifices to dragon boats, silkworms and silkworms.