NUMBERS & TIME
Add or subtract days
Find a date before or after your starting point.
Getting the tool ready...
Inputs are processed in your browser. This build does not send them to a server.
How it works
Find a date before or after your starting point. Fill in the form and choose Calculate. It opens with an example already filled in, so you can see how it works first.
What you need
- Starting date
- Calendar days to add (negative to subtract)
What you get
- Resulting date, Day
- Copy or save the result
Example
The tool opens with Starting date: 2026-10-04; Calendar days to add (negative to subtract): 30.
That gives: Resulting date: 2026-11-03; Day: Tuesday.
Good to know
Calendar arithmetic only. Not a legal, employment or statutory deadline calculator.
Your privacy
What you type is worked out in your browser and is not sent anywhere. There are no accounts, adverts or tracking scripts.