Add or Subtract Days from Date
Add or subtract days, weeks, months, or years from any starting date.
How to Use This Calculator
1
Enter Starting Date
Select any starting date from the calendar or type it in.
2
Choose Operation & Unit
Select whether to add or subtract, then choose days, weeks, months, or years.
3
View Result
Get the exact future or past date along with day of the week.
Practical Examples
30 Days From Today
16 August 2026 + 30 Days
Wednesday, September 15, 2026
90 Days Contract Deadline
1 January 2026 + 90 Days
Wednesday, April 1, 2026
Frequently Asked Questions
How does month addition work for short months (e.g., Feb 28/29)?
If you add 1 month to January 31, the result is capped to the last valid day of February (Feb 28 or Feb 29 in leap years) to prevent invalid date errors.
Can I calculate negative dates or past dates?
Yes! Select the "Subtract from Date" option to find past dates X days or months ago.
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