Enter a date of birth for leap-day birthday details: your age, true 29 February birthdays, and the next leap day.
Put in your date of birth and this tool gives you your leap-day birthday details. If you were born on 29 February, it shows how many real 29 February birthdays you have actually had and the date of your next one. For any other date, it just checks whether your birth year was a leap year.
How 29 February birthdays are counted
29 February only comes around in leap years, roughly once every four years, so someone born on that date has far fewer real birthdays than their age in years. The tool counts the actual 29 February dates that have passed since your birth, and finds the next leap year your birthday falls in. Quick rule: a year is a leap year if it divides by 4, except century years, which also have to divide by 400. That is why 2000 was a leap year but 1900 was not.
Frequently asked questions
How many birthdays does a 29 February baby have?
Only one real birthday every four years, since 29 February shows up only in leap years. The tool tells you how many actual 29 February birthdays you have had so far.
When is my next 29 February birthday?
The tool finds the next leap year on or after today and shows you the date and how many days away it is.
How do I know if a year is a leap year?
A year is a leap year if it divides by 4, except century years, which also have to divide by 400. So 2000 was a leap year but 1900 was not.