29 February - Leap year

 

 

A leap year is a calendar year containing an extra day, February 29, to keep the calendar year synchronized with the astronomical year. The Earth's orbit around the sun takes about 365.25 days, so to account for this extra fractional day, an additional day is added approximately every four years. This practice helps align the calendar with the seasons and prevents a drift in dates over time. Leap years follow a rule: a year is a leap year if it is divisible by 4, except for end-of-century years, which must be divisible by 400 to be a leap year. The extra day is inserted in the month of February.