A February 29 birth date only comes around once every four years. Enter the birth date and a reference date, and the tool counts how many February 29s have actually passed between them, then shows the most recent one and the next one with its weekday. You can also table a chosen number of upcoming February 29s, which helps when booking the next birthday gathering well ahead of time.
Leap years are decided with the Gregorian rule alone: a year divisible by 4 is a leap year, and a year divisible by 100 only counts if it is also divisible by 400. All date work is done by adding calendar components directly, so the result does not shift with the reader time zone. Written as of October 2026, and every date value comes from your own input.
Whether a common-year birthday falls on February 28 or March 1 is not fixed by any single official standard, so it is left as a choice and the option you picked is printed with the result. A plain leap year check is not covered here, and no legal age or age-of-majority decision is made. For birthdays used in filings or official paperwork, follow the guidance of the agency involved.
Frequently Asked Questions
No single date is fixed in law, so some people count February 28 and others count March 1. Both options are offered here and the one you pick is printed with the result.
The Gregorian rule is used as is. A year divisible by 4 is a leap year, a year divisible by 100 is not, but a year divisible by 400 is again. 1900 was a common year and 2000 was a leap year.
This tool does not cover a plain leap year check. It counts how many February 29 birthdays someone born on that date has actually reached and when the next one falls.