A leap year is one day longer than a regular year, with 366 days instead of 365. In a leap year, February has 29 days since an extra day, known as leap day, is added to the month.

Today on February 29th, Google's Doodle honors the day with an image of a frog labeled "February 29," situated between the dates "February 28" and "March 1." The date "February 29" vanishes when the frog jumps. The word "Google" is discreetly included in the background of this image, which is set in a pond with pebbles and leaves.

A lighthearted message reads, "The Ribbiting news, it's Leap Day!" next to the animated doodle. Only once every four years, on February 29th, is Leap Day observed to keep our calendars in line with the sun and Earth.

Almost every four years, leap years happen. There is a little exception, though: leap years are not those that are divisible by 100 but not by 400. Thus, for instance, 2000 was a leap year while 1900 was not.
After 2024, 2028 will be the following leap year.

For our calendar system to remain in sync with Earth's rotation around the Sun, leap years are important. Birthday celebrations present unusual complications for those with leap day birthdays, making them distinctive.