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- Pick a date and time to see how many days, hours and minutes are left until then.
- If the date has already passed, the calculator shows how long ago it was.
- You also get full days, total hours, total minutes, weeks and days, and the number of calendar days from today.
- The count uses your device clock and time zone, so it matches the time on your phone or computer.
How to use the days until calculator
Choose the target date
It starts on January 1 of next year. Change it to your event, deadline or trip.
Add a time if you need one
Leave 00:00 to count to the start of the day, or set an exact time.
Read the countdown
The main result shows the days, hours and minutes left.
Check the totals
See the same gap as weeks, total hours and total minutes.
How the countdown is calculated
The calculator turns your target date and time into one exact moment, then subtracts the current time from it. The difference is split into whole days of 24 hours, the hours left over, and the minutes left over after that.
Two different day counts can look alike. Full days counts whole 24-hour periods, so a target tomorrow morning is 0 full days away if it is under 24 hours from now. Calendar days compares dates only, so tomorrow always counts as 1 calendar day. The calculator shows both so you can pick the one you need.
Countdown rules
Difference = target moment − current moment
Full days = difference ÷ 24 hours, rounded down
Hours left = the remainder ÷ 60 minutes, rounded down
Calendar days = target date − today date
Daylight saving changes can make a day 23 or 25 hours long, and the calculator follows the real clock.
Worked examples
Example 1: days until Christmas
It is 6:49 am on October 24, 2026. How long until midnight at the start of December 25?
Calendar days is one higher than full days because part of today has already passed.
Example 2: later the same day
Same start time. The target is 6:30 pm today.
A target on the same date has zero calendar days to go.
Example 3: a date that has passed
Same start time. The target is midnight at the start of October 1, 2026.
Once the moment has passed, the label changes from Time left to Time since.
Example 4: the start of next year
Same start time. The target is midnight at the start of January 1, 2027.
The example numbers depend on the moment you run the calculator, so yours will differ.
Time unit conversions
Handy conversions
Useful when you want a countdown in other units.
The calculator already shows total hours and minutes, so you rarely need to convert by hand.
Where a days until calculator helps
Holidays and trips
Count down to a flight, a vacation or a public holiday.
Exams and deadlines
See how much time is left to study or to hand in work.
Birthdays and anniversaries
Check how many days remain until the next celebration.
Launches and events
Track the days to a product launch, a wedding or a match.
To count the days between two fixed dates, use the date difference calculator. To find the date a set number of days ahead, use the add days to date calculator, and for working days only try the working days calculator. The age calculator shows the days left until your next birthday.
Days until calculator FAQ
How many days until a date?
Choose the target date. The calculator shows the full days plus the hours and minutes left, and the calendar days from today.
What is the difference between full days and calendar days?
Full days counts whole 24-hour periods from now. Calendar days compares the dates only, so tomorrow is always 1 calendar day, even when it is less than 24 hours away.
Does the countdown update by itself?
It recalculates whenever you change an input and when the page loads. Refresh the page or change a value to get a fresh count.
Which time zone does it use?
The time zone of your device. The target date and time are read as local time, so the countdown matches your own clock.
Can it show how long ago a date was?
Yes. If the date has passed, the label changes to Time since and shows the days, hours and minutes that have gone by.
Does it count weekends?
Yes, every day counts. For business days only, use the working days calculator.