Leap Year Birthday 2025. If the last two digits of the year are divisible by four (for example, 2016, 2020, 2025.) then it’s a leap year. As leap year comes every four years, it means those born on february 29 miss out on birthdays.

Century years are the exception to this rule. If you were born on leap day 1924, you would be 100 years old or 25 in leap day years.