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Count down to any date and time — a launch, holiday, or your next birthday — in days, hours, minutes, and seconds.
Also covers: Countdown timer · Birthday countdown
In your local time zone.
Your date of birth; the countdown targets the next birthday.
Countdown
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Pick a date and time.
Enter a date and time, or use a quick pick: New Year, Christmas, or your next birthday.
The countdown updates every second. After the moment passes, it counts the time since instead.
Your device's time zone. The countdown targets that moment on your clock, so share the date and time together with the time zone when others are counting down too.
The target is fixed, so reopening the page and entering it again shows the correct remaining time. The page doesn't save it for you.
No. Everything is calculated in your browser, and nothing you enter is sent to a server or stored.
Age
Calculate exact age in years, months, and days from a date of birth, plus total months, weeks, and days, and how long until the next birthday.
Duration
Count the days between two dates, and see the difference in years, months, weeks, weekdays, hours, and minutes.
Date maths
Add or subtract days, weeks, months, and years from a date to find a deadline, due date, or anniversary.
Work days
Count working days between two dates, or add working days to a date, skipping weekends and US or UK public holidays.
Weekday
Find the day of the week for any date, past or future, plus its day of the year, ISO week, and quarter.
ISO week
Find the ISO 8601 week number for any date, with the week's Monday-to-Sunday dates, the US week number, and every week of the year.