Date Addition Calculator
Shift any start date forward or backward on Jenzzy for deadlines and scheduling.
Inputs
Results
Enter values to see results.
Formula
Result = Start ± offset (days/weeks/months)
Month addition clamps to valid month-end dates when needed.
Example
- Add 45 days: Mar 15 + 45d
- Result: Apr 29, 2026= Apr 29, 2026
Result: April 29, 2026
Frequently Asked Questions
Leap years?
Handled automatically in calendar math.
Subtract?
Use negative offsets to go backward.
Weekdays only?
Switch to business days mode for work calendars.