Date calculator: Add to or subtract from a date

This service enables you to add or subtract days, months and years to a date to calculate a past or future date.

Design changes: What is new and why?

Start Date



From Tuesday, September 11, 2001
Added 49 months, 49 weeks, 49 days
Normalized to 4 years, 1 month, 392 days

Result: Tuesday, November 7, 2006

If the larger units (months/years) are added before the smaller units (days).

Alternative result: Wednesday, November 8, 2006

If the smaller units (days) are added first

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Help and example use

Date Calculators

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