Qixi Festival-七夕节( qī xī jié) literally “The Night of Sevens“), also known as Magpie Festival, falls on the seventh day of the seventh lunar month on the Chinese calendar. In 2009, it’s on August 26th.
A love story for this day is about the 7th daughter of Emperor of Heaven and an orphaned cowherd. The Emperor separated them. The 7th daughter was forced to move to the star Vega and the cowherd moved to the star Altair. They are allowed to meet only once a year on the day of 7th day of 7th lunar month.
Watch this video below, it provides one common version of this Chinese traditional love story.
References and other resourses:
1. To read Qi Xi Jie story in Chinese-from Baidu
3. Qixi Festival-from Wikipedia
If you are in China or have some friends, most likely, you would hear people talking about this festival.
Watch this video and read some referenced artiles, you would know more about this festival than average Chinese do.