According to Wikipedia:

Qi Xi (Chinese: 七夕; pinyin: qī xī; literally “The Night of Sevens“), also known as Magpie Festival, falls on the seventh day of the seventh lunar month on the Chinese calendar; thus its name. It also inspired Tanabata in Japan, Chilseok in Korea, and That Tich in Vietnam. It is sometimes called Chinese Valentine’s Day in recent years.

Young girls traditionally demonstrate their domestic arts, especially melon carving, on this day and make wishes for a good husband. It is also known by the following names:

  • The Festival to Plead for Skills (乞巧節; qǐ qiǎo jié)
  • The Seventh Sister’s Birthday (七姊誕; qī jiě dàn)
  • The Night of Skills (巧夕; qiǎo xī)

In 2008, this festival falls on August 7.

Happy The Night of Sevens, fellows!

Thank Zoe for the information.