Date Add/Subtract Calculator

Find the resulting date after adding or subtracting a time period to a starting date.

How to use

Pick start date, choose add/subtract, enter years/months/days.

Formula

Calendar arithmetic on the start date.

Examples

  • 2026-01-15 + 3 months → 2026-04-15

Important notes

Handles month-end overflow correctly.

Frequently asked questions

Can I subtract?

Yes, choose Subtract.

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