Dates & time
Add or subtract days
Move a calendar date forwards or backwards.
A clear answer. Here’s how.
Adds calendar days using UTC date arithmetic. All weekdays count, with no holiday exclusions. Supports dates in years 0001–9999.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Starting date
- 2026-01-01
- Days to add (negative to subtract)
- 30
Example result
2026-01-31