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Days until calculator

How many days, working days and weeks are left until a date?

Dates 1900 to 2200. The start day is not counted. Public holidays are not counted.

Pick a date to see how many days are left.

How to use it

  1. Pick the date. Choose the date you are counting to. It can be in the future or in the past.
  2. Change the start if you need to. The count starts today. Set a start date to count between any two dates.
  3. Read the result. You get calendar days, working days (Monday to Friday) and weeks. The result updates as you type.
  4. Share it. Copy the link to send the same result, copy it as Markdown, or download it as a CSV or an image.

How it works

Each date becomes a whole-day number counted from 1 January 1970, using the calendar date only. The calendar days are the difference between the two numbers, so time zones and clock changes cannot move the answer.

Working days count the Monday to Friday days after the start date up to and including the target date. Weeks are the calendar days divided by 7, with the leftover days shown next to them. Public holidays are not counted.

Need the due date for a list of stages instead? Use the SLA calculator.

Try an example: 10 November 2026 to 25 December 2026

Questions

Is the start day counted?
No. The count begins the day after the start date and includes the target date, so Friday to Monday is 3 calendar days and 1 working day. A date to itself is 0.
Are public holidays excluded from working days?
No. Working days are Monday to Friday only. Holidays differ by country and company, so subtract them yourself if they apply.
Does it use my time zone?
It works on calendar dates, not clock times, so a result never shifts by a day because of a time zone or a daylight-saving change. "Today" is the date on your device.
Is anything sent or saved?
No. The maths runs in your browser. The dates you enter live only in the page address, so a copied link reproduces the result and nothing is stored on a server or in your browser.
Can I count days since a past date?
Yes. Pick a date in the past and the result says how many days ago it was.

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