How are the days until my birthday counted?

The tool finds the next time your birth month and day occur on or after today, then counts the whole days between today and that date. If the birthday is today, it says so.

What happens with a 29 February birthday?

In years that are not leap years there is no 29 February, so the countdown uses 28 February as the closest matching day for that year.

Is my birth date stored or uploaded?

No. Everything is calculated in your browser with local date arithmetic — your birth date never leaves your device.

Next Birthday Countdown

See how many days until your next birthday and which weekday it falls on.

Next birthday countdown

Enter a date of birth and this tool tells you how many days until the next birthday, the age you will turn, and which day of the week that birthday falls on. If today is the birthday, it celebrates instead of counting.

It handles 29 February birthdays by using 28 February in non-leap years, and runs entirely in your browser — your birth date never leaves your device.