The date of the dragon boat festival

There are also great deviations in the Bielong Festival in different places: the Bielong Festival in North China is mostly arranged on May 23rd every year. However, according to ancient records, the Dragon Festival was held on the 20th of May in the lunar calendar more than 1000 years ago. For example, Tan Hui said: February 20th is called Little Dragon Day. Sunny day, lazy dragon, main drought; Rain, healthy dragon, main water. The Book of Agricultural Administration also said: On May 20, when there is thunder but no rain, it is called "Locking the Dragon Gate".

The uncertainty of this date may be related to the extensive dating methods of the people. In addition, the longer it spreads and the wider the area, it will inevitably change.