Qixi Festival 七夕节

Double Seventh Festival 双七节

Magpie Festival 喜鹊节

The Begging Festival 乞巧节

Chinese Valentine's Day 中国的情人节

维基百科对中国七夕节的介绍：

The Qixi Festival, also known as the Qiqiao Festival, is a Chinese festival that celebrates the annual meeting of the cowherd and weaver girl in Chinese mythology. 

It falls on the seventh day of the 7th month on the Chinese calendar. It is sometimes called the Double Seventh Festival, the Chinese Valentine's Day, the Night of Sevens, or the Magpie(喜鹊) Festival.