Date Calculator
Compare two dates
Your date difference
Choose two dates to see your result.
Business days are Monday–Friday; public holidays are not excluded. By default, counts run after the earlier date through the later date. “Include both dates” also counts the earlier date. Reverse ranges return negative counts. Calendar dates are calculated without timezone or daylight-saving shifts.
How to use Date Calculator
- Choose a date difference or add/subtract operation.
- Enter dates and select calendar or Monday–Friday business days.
- Check endpoint inclusion and copy the calculated result.
Try an example
Calendar difference from 2026-01-01 to 2026-01-08, without including both endpoints.
7 calendar days. Business-day calculations exclude weekends but do not exclude public holidays.
What to know before using Date Calculator
Compare two dates or add/subtract a whole number of calendar days. Business days are Monday–Friday without public-holiday exclusions. By default, count dates after the earlier date through the later date; Include both dates also counts the earlier date. Reverse ranges return negative counts. Equal dates return zero unless both endpoints are included. Date-only calculations avoid timezone and daylight-saving shifts. Dates must be between years 0001 and 9999, with day offsets limited to −100,000 through 100,000. Use today follows your device’s local calendar date.