What festival is the 21st day of the first month?

The 21st day of the first month is the day to wear heavenly clothes.

It's a day to wear clothes. Sky-piercing Festival is popular in Xiangyang, China, which is a unique traditional festival and custom in this area. It originated from a beautiful legend, that is, Zheng Jiaofu, a gifted scholar, met the goddess of Hanshui in Wanshan, Xiangyang, and gave Zhu Pei a promise. According to news and newspaper records, there are activities with different themes in this area on the 21st day of the first month every year. The Day Wearing Festival with the theme of "Gathering in Xiangyang City and Flying the Dream of Hanjiang River" was grandly staged in Zhoutou, Yuliang, and it was very lively.