Instructions
Add or subtract dates
How to use
Choose the start date, add or subtract, then set the number and unit.
Choose the start date, add or subtract, then set the number and unit.
Supported input
0 to 36,500. Months and years keep the same day, or the last day when that month is shorter. Working days skip only Saturdays and Sundays.
Input example
2026-10-13 + 100 days
Result example
2027-01-21 Thursday
Troubleshooting
Values that are not numbers or are out of range are not calculated; the message says what to fix.
Limitations
Public holidays are not skipped. The start date itself is not counted.
How it works
Adds or subtracts days, weeks, months, years or working days from a date and gives the date and weekday. 0 to 36,500. Months and years keep the same day, or the last day when that month is shorter. Working days skip only Saturdays and Sundays.
Units & precision
0 to 36,500. Months and years keep the same day, or the last day when that month is shorter. Working days skip only Saturdays and Sundays.