Google is celebrating Leap Day today with a doodle. Leap Day, which comes every four years on February 29, is a day observed in various solar calenders including Gregorian calendar, reports Hindustan Times.
However, even in the Greforian calender, years that are divisible by 100, but not by 400, do not contain a leap day.
The Earth’s orbital revolution around Sun takes 6 hours longer than 365 days, and Leap Day compensates this lag and realignes the calendar with the Earth’s position in the Solar System.