About Add or Subtract Days
Calculate a new date by adding or subtracting years, months and days.
How it works
Years, months and days are added to or subtracted from a start date using the same calendar rules in both languages.
How to use
- Select the start date.
- Choose Add or Subtract and enter the intervals.
- Read the resulting date and weekday.
Practical example
Add seven days to 1 January 2026 to get 8 January 2026.
Useful tips
Month lengths differ. Review results around the end of a month and leap years.