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Date Difference and Date Add/Subtract Calculator

Find calendar-day difference or move a date by a chosen number of days.

Your inputs

Your result

Enter your information and select Calculate to see the result.

How this calculator works

Date difference subtracts UTC calendar dates. Add/subtract changes the UTC calendar date by whole days.

Change one assumption at a time to see which inputs have the greatest effect on the estimate.

Worked example

January 1 to January 31 is a 30-day difference.

Limitations

This does not count partial days, business days, time zones, or daylight-saving transitions.

Review this educational estimate against current quotes, official information, and your own budget before making a financial decision.