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Add or Subtract Dates
Add or subtract days, weeks, months or years from a date and get the exact date, weekday and total days.
Favorite it to find it fast on home
When to use it
January 31 plus one month → February 28 (or 29); end of month is clamped
Two weeks before an exam → find your prep deadline instantly
One year after a contract date → get the exact expiry date
How to use it
1Step 1Fill in Base date
2Step 2Change a value and the result updates instantly
3Step 3Save or copy the result
If the result looks off
The result looks wrong
Check the units and the baseline first. Changing a value updates the result instantly.
I want the starting values back
Press reset to return to the initial state.
Frequently asked questions
How are months handled?
Calendar-based, so one month after January 31 is clamped to the end of February.
Does it tell me if the result is a weekend?
Yes. The result shows the weekday and flags weekend dates.
How are leap years handled?
Leap days are handled automatically. One year after Feb 29 becomes Feb 28.