Date Add / Subtract Calculator
Add or subtract days, weeks, months, or years from any date. Instantly see the resulting date with day of week.
Start date
Operation
Start date
Thursday, May 14, 2026
2026-05-14
+ 30 days
Result date
Saturday, June 13, 2026
2026-06-13
Difference breakdown
30
total days
4
weeks + 2d
1
months
0
years
Date Add / Subtract Calculator
The Date Calculator lets you add or subtract any number of days, weeks, months, or years from a starting date to find the resulting date.
Common uses
- Find what date falls 90 days from today (contract deadlines)
- Calculate a date 6 months in the future for recurring events
- Find the date 2 years ago from any reference point
Month and year arithmetic
Adding one month to January 31 gives February 28 (or 29 in a leap year) since February never has 31 days. Adding one year to February 29 gives February 28 in non-leap years.