Lunar calendar. According to the weather calendar website, Valentine's Day in China falls on the seventh day of the seventh lunar month, and the new calendar falls on Tuesday, August 22nd, 2023, which is a traditional folk festival in China. July 7th is China's Valentine's Day on Qixi, which comes from the myth and legend story that Cowherd and Weaver Girl meet on Qixi Bridge. It was originally to celebrate the sad love story between Cowherd and Weaver Girl, and later it evolved into China's version of Valentine's Day.