121212

121212 is a numeric string formed by the digits "12" repeated three times. It is most often encountered as a date when written as 12/12/12 or 12-12-2012, a pattern in which the day, month, and year share the number 12. The repetition has made the sequence memorable in popular culture and media contexts.

In date usage, 12/12/12 was widely publicized as a notable triple-repetition day in many regions that use month/day/year or day/month/year formats. In the United States the equivalent form is December 12, 2012. The date has appeared in marketing campaigns, news coverage, and commemorative events due to its symmetry and rarity.

One prominent event associated with 12-12-12 is 12-12-12: The Concert for Sandy Relief, a benefit held at Madison Square Garden on December 12, 2012 to aid victims of Hurricane Sandy. The broadcast featured multiple artists and was designed to raise funds for relief efforts, helping to popularize the date in the public imagination.

Beyond dates, 121212 can serve as a simple placeholder or identifier in computing, datasets, or puzzles because of its straightforward and symmetric pattern. It is also sometimes used in examples for passwords, test data, or mnemonic cues.

See also: 12/12/12, 12-12-2012, the Concert for Sandy Relief.