Birthday Calculator
Find the next birthday from a date of birth, how many days are left until it, and the weekday of the birth. The today date can be any day you choose.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
The next birthday keeps the birth month and day, in the year of the today date. If that day has already passed, it moves to the following year.
Age is the number of years between the two dates, less one if this year's birthday has not yet come.
Worked example
Born on 1990-06-14, the next birthday is 2027-06-14, which is 221 days from 2026-11-05. The age on 2026-11-05 is 36, and the day of birth was a Friday.
Questions
What about a February 29 birthday?
In years with no February 29, a leap-day birthday can fall on a different date. Check the answer for that year.
Why does it ask for a today date?
The answer depends on the day you use. Leave it as today, or type any other date to plan ahead.
How is the weekday worked out?
It is worked out from the calendar for the birth date you typed, so it does not depend on the year you check.
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