Foursquare Day

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When Celebrated

Always on April 16th


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About the Holiday

Foursquare Day (or 4sqDay) is a social media and math holiday that was first observed in 2010 after the social media site declared the holiday on April 16th in response to a grass roots campaign. The 4/16 date was chosen because four squared equals 16 and a Tampa businessman was looking to promote his business by having people check-in to his optometry business on the 4th month and 16th day.[1]

Gift Guidelines

  • Invite someone to check-in on a local place for lunch or dinner
  • Tweet your favorite place to check-in

Related Holidays


  1. Creative Loafing Tampa: Tampa leads the world in using foursquare to promote local businesses by Julia Gorzka, April 14th, 2010

April Info & More Holidays

Birthstone: Diamond.jpg
Flower: Sweetpea.jpg
Mar 21 - Apr 19


April 20 - May 20