Birthday Countdown
Calculate how long until the next birthday.
Calculate how long until the next birthday.
Birthday countdown
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Tool guide
Free Online Birthday Countdown
Count down to the next occurrence of a birthday in days, hours, minutes, and seconds. Enter the birth date, calculate once, and the result updates live using your browser's current clock and local timezone.
Steps
How it works
- Choose the birth date.
- Calculate the next birthday from the current browser time.
- Watch the days, hours, minutes, and seconds update live.
- Copy or download the countdown result when useful.
Highlights
Key features
- Finds the next occurrence of the selected month and day.
- Shows days, hours, minutes, and seconds remaining.
- Updates the calculated countdown once per second.
- Shows the age the person will be turning from the entered birth year.
- Automatically targets the following year after this year's birthday has passed.
Use cases
Common uses
- Check how many days remain until a birthday.
- Run a live birthday countdown in an open browser tab.
- See the age associated with the next birthday.
- Copy a current countdown for a message or personal note.
Notes
Limitations to know
- The full birth date, including the year, is required because the tool also calculates the upcoming age.
- The result depends on the device clock and browser's local timezone.
- February 29 birthdays follow JavaScript calendar rollover behavior in non-leap years.
- The countdown is not persisted across a refresh or closed tab.
- Browser reminders, scheduled notifications, calendar events, and alarms are not provided.
FAQ
Frequently asked questions
Is the birth year required?
Yes. The next birthday uses the month and day, while the entered year is used to show the age the person will be turning.
Does the birthday countdown update live?
Yes. After you calculate it, the displayed countdown refreshes once per second while the page remains open.
What happens after the birthday arrives?
The calculation moves to the birthday in the following year once the current occurrence is no longer in the future.
How is a February 29 birthday handled?
The tool relies on browser Date rollover rules, so the effective date in a non-leap year may roll into early March.
Which timezone does it use?
It uses the local timezone and current clock configured on your device.
Can it send a birthday reminder?
No. The tool displays a countdown only and does not schedule notifications or reminders.