Date Calculator
Add or subtract days, weeks, months, or years from any date
Map out dependent tasks alongside CountdownPro and capture printable schedules via StopwatchPro after you finalize each adjusted date.
Calculate Date
Result
Resulting Date
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💾 Calculations are saved automatically to your history
How It Works
Our date calculator handles smart date arithmetic, correctly managing month-end edge cases and leap years. For example, adding 1 month to January 31st gives you February 28th (or 29th in leap years), not March 3rd.
Need to calculate business days only? Enable Business Days Mode to automatically exclude weekends and US federal holidays. For more specific time tracking needs, check out our CountdownPro for versatile countdown timer suite, and once your schedule is locked, StopwatchPro makes sharing printable agendas effortless.