How many days until your birthday?
Enter your date of birth and the countdown targets your next birthday — the next time that month and day comes round — with the days remaining, the weeks and days, and the weekday.
Enter your birth date to see exactly how many days until your next birthday.
Pick the date to see the countdown to its next anniversary.
The countdown is measured from today to the next occurrence of your birth month and day, in whole days.
How does it work?
Days are counted in whole calendar days using UTC, so the result is unaffected by time zones or daylight saving. A negative count means the date has already passed.
Days-until formula
- d
- Whole days between today and the target date.
- target
- The date you are counting down to.
- today
- The current date (your local today).
From 1 June to 1 July is 30 days.
Method & sources
We count whole calendar days from today to the date you choose. Both dates are handled in UTC so time zones and daylight saving never shift the result. You pick the target date yourself — the calculator does not look up holidays or official calendars.
How we calculate
- The count is whole days from today to the date you choose.
- Today is your device's local date; the target date is the one you pick.
- A negative count means the date has already passed.
- The day of the week shown is the weekday the target date falls on.
Rounding
The countdown is in whole calendar days. Today and the target date are counted in UTC, so time zones and daylight saving never shift the result.
What this countdown does
Your birthday comes round every year, so this countdown takes the month and day of your birth date and finds the next time it lands — this year if it's still ahead, otherwise next year.
How to use it
- Pick the date you're counting down to.
- Read the days remaining at the top.
- Check the weeks-and-days breakdown and the weekday it falls on.
- Use Share to send the live countdown to anyone.
When it's useful
Use it to plan a party, drop a hint about presents, or just enjoy watching the days tick down.
How the days are counted
The count is in whole calendar days from today to the date you pick, calculated in UTC so it never drifts with time zones or daylight saving. If the date has already passed, the count shows how many days ago it was.
FAQ
- How many days until my birthday?
- Enter your date of birth above and the countdown shows the exact number of days until your next birthday.
- What about a 29 February birthday?
- In years without a 29 February, the countdown targets 1 March, the most common convention for leap-day birthdays.
- Can I share the countdown?
- Yes. Share copies a link that reopens the countdown to the same date, always counting from the viewer's today.
Related calculators
Embed this calculator
Add this calculator to your own site. The snippet includes the calculator iframe and a small attribution link:
<iframe src="https://wisecalcs.com/embed/en/days-until-birthday-calculator" width="100%" height="520" style="border:0" loading="lazy"></iframe>
<p>Calculator from <a href="https://wisecalcs.com/en/time-date/days-until-birthday-calculator">WiseCalcs</a></p>