Start of Summer Market
Sunday, 5. May 2024 in 南涧县无量乡与宝华镇交界地马鹿田 Nanjian, Malutian
Start of Summer market.
http://chenzhig.blogchina.com/139827.html Possibly on 5th of May, rather than the astronomical start of summer.
Festival held according to the Chinese Solar Terms 节气