Extra day added on

Monday  2016! A date that usually occurs every four years, and it’s called

February is the shortest month and the only month with fewer than 30 days.

The month has 28 days in common years or 29 days in leap years.

Leap years are needed to keep our calendar in alignment with the Earth’s revolutions around the sun because the Earth does not orbit around the sun in precisely 365 days.

Leap year tradition, theproposal

The next leap day is February 29, 2020.