Singles' Day (simplified Chinese: 光棍节; traditional Chinese: 光棍節) or Double 11 (simplified Chinese: 双11; traditional Chinese: 雙11) is an unofficial Chinese holiday for people who are not in a relationship.
Ironically, the holiday has become a popular date on which to celebrate relationships: more than 4,000 couples got married in Beijing on this date in 2011, far greater than the daily average of 700 marriages.
The event is not an officially recognized public holiday in China, although it has become the largest offline and online shopping day in the world.