Birthday
Enter a birthday month and day. Birth year is optional and only adds turning-age context.
Birthday Countdown
Find how many days remain until the next birthday, with optional birth-year context and clear leap-day handling.
How this birthday countdown works
Enter the birthday month and day. The calculator compares that date with today's local calendar date and targets the next matching birthday. If it has already passed this year, it rolls forward to next year.
The optional birth year adds a turning-age row, but it is only date math. It does not verify identity, legal age, or eligibility.
Birthday planning and leap-day notes
Use it for party planning, birthday reminders, classroom date examples, checking the weekday of the next birthday, or sharing a simple countdown. February 29 birthdays stay February 29 and target the next leap year when needed.
Related birthday and countdown tools
For a general days-left result, use the days until calculator. To calculate age on a date, use the age calculator. For named live countdowns, use the event countdown. To add or subtract days and months, use the date calculator. For January 1, use the New Year countdown. For December 25, use the Christmas countdown.
Birthday countdown FAQ
How is the next birthday chosen?
The calculator compares the selected month and day with today's local calendar date. If that birthday has passed this year, it targets the next year.
How are February 29 birthdays handled?
February 29 stays February 29. If the next occurrence is not in the current year, the countdown targets the next leap year that has February 29.
Does the turning-age result verify eligibility?
No. The optional birth-year context is just date math and does not verify identity, legal age, or eligibility.