Half Birthday Calculator
A half birthday falls six months before or after a birthday. Some people mark it as a small milestone, and this page finds the next one.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
The half birthday keeps the birth month and day, six months away from the birthday in the year of the today date. The page checks the half birthdays on either side and picks the first one still ahead.
The days until it are counted from the today date, which you can change at any time.
Worked example
For a birth date of 1990-06-14, the next half birthday after 2026-11-05 is 2026-12-14, which is 39 days away.
Questions
Is a half birthday a legal date?
No. It is a popular way to mark the middle of the year between birthdays, and it has no legal meaning.
Why does it use a today date?
The next half birthday depends on the day you check. Change the today date to plan ahead.
What about a February 29 birthday?
A leap-day birthday can land on a different day in February in other years. Check the result for that year.
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