Free

Date Calculator

To find the number of days between two dates, pick a start and an end date; the day difference, weeks, full months and business days (Monday–Friday) are calculated instantly. To add or subtract days, enter a date and a number of days; the resulting date appears with its weekday. Business days exclude only Saturdays and Sundays; public holidays are not taken into account.

Difference between two dates

Days between
—
Weeks
—
Full months
—
Business days (Mon–Fri)
—

Business days include both the start and end dates and exclude only Saturdays and Sundays. Public holidays are not taken into account.

Add / subtract days

Operation
Resulting date
—

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How to use it

  1. 1Pick the start and end dates; use 'Today' to insert today's date.
  2. 2Read the day difference, weeks + days, full months and business days in the result boxes.
  3. 3Remember that business days include both end dates and public holidays are not subtracted.
  4. 4In the lower section, enter a date and a number of days and choose 'Add days' or 'Subtract days'.
  5. 5Read the resulting date together with its weekday.

Frequently asked questions

Does the day difference include the start and end dates?

The day difference is the number of calendar days between the dates (end − start); for example, 1 March to 3 March is 2 days. Add 1 if you want to count both days. Business days, however, include both end dates.

Are public holidays subtracted from business days?

No. The tool excludes only Saturdays and Sundays. National and religious holidays and other days off are not taken into account; subtract them from the result yourself.

How are full months calculated?

Completed calendar months from the start date are counted. From 15 January to 15 March there are 2 full months; from 31 January to 28 February there are 0, because the 31st is not reached.

Do daylight saving time or time zones affect the result?

No. The calculations use calendar days only, without times, so daylight saving changes and time zone differences do not change the day count. 29 February in leap years is handled correctly.

Can I use it for legal deadlines or due dates?

The tool is for quick, informational calculations. For legal deadlines, the rules on holidays and on how the first and last days are counted depend on the applicable law; consult an expert for official matters.

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