Add / Subtract Date

Add or subtract years, months, weeks and days from any date

How to use

Follow these steps to get a result

  1. Pick a start date.

  2. Choose Add or Subtract, then enter years, months, weeks, and/or days.

  3. Tap Calculate to see the resulting date (and export it if you like).

Features

What this tool includes

  • Add or subtract years, months, weeks, and days

  • ISO date and weekday in the result

  • Export result summary (Copy / CSV / PDF)

FAQ

Common questions about this tool

Month arithmetic uses the calendar month (e.g. Jan 31 + 1 month becomes Feb 28/29 depending on the year), then weeks and days are applied.

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