National High Five Day — 16 April

Up high! Make sure to give a “high five” to everyone you meet on April 16, because it’s National High Five Day.

How did this all start? Depends on whom you ask. We’re going with the baseball story that dates back to 1977, when Dodgers Dusty Baker and Glenn Burke gave each other a high five in celebration. Baker’s home run had just made L.A. the first team in history to have four hitters with at least 30 home runs in a single season.

Today people everywhere use it to mean “Congratulations!” or “Great job!” We’re still quite nostalgic for the “low five,” of course, which may have originated back in the 1920s.