Date Calculator

Add or subtract time from any date to find your target day.

Start Date

Operation

Years

Months

Days

Resulting Date

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Select parameters above

Week of the year -

Day of the year -

How it works

This date calculator uses high-precision astronomical algorithms to account for the varying lengths of months and the occurrence of leap years. When you add a month to January 31st, the tool intelligently identifies the last day of February, ensuring your project timelines and milestones remain accurate.

Business Use

Perfect for calculating contract expiration dates, project deadlines, or financial maturity dates based on a 365/366 day year.

Personal Planning

Calculate exactly when you'll reach a milestone, like "90 days from today" or finding the date of an event next year.