七夕用英语怎么说？

Double-Seventh Day 农历七月初七

或者

七夕情人节 大家都喜欢用 Chinese Valentine\'s Day

然而我的外国朋友常这样对我讲:

Happy Night of Sevens! 七夕节 快乐!

对女孩子可以这样问候:

Happy Festival to Plead for Skills! 乞巧节快乐!

相关资料:

The festival has its origin from a romantic tragedy. As the story goes, once there was a cowherd, Niulang, who lived with his elder brother and sister-in-law. But she disliked and abused him, and the boy was forced to leave home with only an old cow for company. The cow, however, was a former god who had violated imperial rules and was sent to earth in bovine form. 

One day the cow led Niulang to a lake where fairies took a bath on earth. Among them was Zhinu, the most beautiful fairy and a skilled seamstress.

The two fell in love at first sight and were soon married. They had a son and daughter and their happy life was held up as an example for hundreds of years in China.

Yet in the eyes of the Jade Emperor, the Supreme Deity in Taoism, marriage between a mortal and fairy was strictly forbidden. He sent the empress to fetch Zhinu.