Days until a date
Pick any future date to see exactly how many days and weeks remain. Great for countdowns to birthdays, holidays, events, or deadlines.
How it works
All date arithmetic uses the browser's native Date object. Day differences are computed by subtracting timestamps and dividing by 86,400,000 ms. Age counts complete calendar months, shown as years and months, then the days since the last monthly anniversary. The page does not call any external library or server during the calculation. Dates are read at local noon in your browser's time zone, so a daylight saving change from the IANA rules built into the browser never moves a count to the wrong day.
Processing runs in your browser
All calculations happen instantly in your browser tab. Our servers are not involved at any point.
Related operations
For working out an exact age in years, months, and days, try the age calculator. To convert any timestamp into a date, use Unix timestamp. For scheduling work across time zones, see the timezone converter.
Frequently asked questions
- How many days until Christmas?
- Enter December 25 of the current year into the date field and the tool will show the exact number of days remaining.
- Can I count down to a date in the past?
- Yes. For a past date the tool shows how many days ago it was, for example "271 days ago".
- How are weeks calculated?
- Weeks are calculated by dividing the total days by 7 and flooring the result. The remaining days are shown separately.
- Does the countdown include today?
- The count starts from today, so tomorrow is 1 day away and today shows "That's today!" instead of a number. It uses your device's date.
Last reviewed September 30, 2026
Other pages for this tool
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