http://daviddawei.com/chinese-valentines-day/
The Double Seventh Festival (Qixi Festival) is one of Chinese traditional festivals, and also known as a Chinese Valentine’s Day. It’s based on a romantic legend about a weaver girl and an ox herd.
It falls on the 7th day of the 7th Chinese lunar month. In 2018 that’s August 17 (Friday). There is no public holiday.