Date Calculator
Add or subtract days, weeks, months, or years from any calendar date.
How to add or subtract from a date
Enter a starting date, choose Add or Subtract, enter a whole-number amount, and select days, weeks, months, or years. The result also shows the weekday.
How shorter months are handled
When adding months or years produces a date that does not exist, the calculator uses the last valid day of that month. For example, one month after January 31 is the last day of February.
Frequently Asked Questions
Yes. Select Subtract to move backward from the starting date.
Yes. Calculations use actual month lengths and leap years.