Foursquare Day (April 16): Why It Matters & How to Observe
Foursquare Day lands on April 16 because 4² equals 16, a playful numerical twist that turned a boot-strapped social app into a global celebration of local discovery. What began in 2010 as a single tweet from a Tampa entrepreneur is now marked in 100-plus cities, generating foot traffic spikes of up to 30 % for…