How the time until countdown works
Enter a date, time, and optional event name. The live countdown shows days, hours, minutes, seconds, and total hours and minutes until the target in your device’s local time zone.
How time until is calculated
The countdown subtracts the current moment from your target date and time, interpreted in your browser’s local time zone. It updates every second and shows the exact target date plus total hours and minutes.
Does a date-only countdown include a time?
Yes. If you leave the time at midnight, the target is the start of that date in your local time. Choose a time to count down to a particular moment.
How remaining time is calculated
Time remaining = target date and time in your local time zone − current time.
Date-only versus date-and-time countdowns
If an event is 1 day and 2 hours away, the countdown shows 1 day, 2 hours, 0 minutes, and 0 seconds, plus total hours and minutes.
What happens for past dates
The target date and time use the browser’s local time zone. A date-only target defaults to midnight if you choose no time, and a past date is identified as already passed.
Use a countdown for an event
Track time until an exam, birthday, trip, launch, deadline, or New Year.
Questions and answers
Does the time until countdown update live?
Yes. It refreshes every second in your browser.
Which time zone is used?
The selected date and time use your device’s local time zone.
What happens when the target date has passed?
The calculator clearly says the date has passed and shows how many days ago it was.