This tool shows a live countdown to your next birthday — the exact days, hours, minutes and seconds remaining until the big day. Enter your date of birth and the timer ticks down in real time, and the summary tells you the date of your next birthday and the age you will turn. It is a fun way to track the wait and plan ahead.
How it works
The tool reads the day and month from your date of birth and builds a target at midnight on that date this year, in your local time zone. If that moment has already passed (your birthday is earlier in the year than today), it rolls the target forward to next year. It then takes the difference between that target and the current time — refreshed every second from your device clock — and breaks it into days, hours, minutes and seconds. The age you will turn is the upcoming birthday year minus your birth year.
Example
If today is 1 March and your birthday is 20 March, the countdown shows 19 days plus the hours, minutes and seconds until midnight on the 20th. The moment that passes, it automatically rolls over to next year’s 20 March.
The summary also shows the date of your next birthday and the age you will turn. Everything runs in your browser; your date of birth is never uploaded.