Leap Day is a tradition that was first introduced by Julius Caesar in 45 B.C.E. and has been in use for the last 2,000 years.
This is a special occurrence that happens only once every four years: by tacking on an extra day to the year, it helps align our calendar properly with Earth’s orbit. In other words, Leap Days are to account for Earth completing one full revolution around the sun about every 365.25 days.
Being born on Leap Day is one of the rarest birthdays a person can have, with roughly a one in 1,460 chance of entering the world on February 29.
Happy Leap Day!