Add or subtract days, weeks, or months from any date to find the resulting date.
Add / Subtract Days
Date & Time
Inputs
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Enter your starting date.
Enter the amount to add or subtract.
Select the unit and operation.
Click Calculate.
Useful for deadline calculations, contract expiry, subscription renewals, and event planning.
JavaScript rolls over — Jan 31 + 1 month = March 3 (or 2 in a leap year) since February has fewer days.