Summary
Add calendar or weekday-only days to a start date.
Calculation details
The start day is day zero. Holiday closures are not included.
Formula
Calendar mode adds UTC days; business mode advances only Monday through Friday.
Worked example
Worked example
Three weekdays after Friday is Wednesday, January 7.
How it works
Enter the start date, days allowed, and whether to count weekdays only. Holidays are not skipped automatically.
Frequently asked questions
What does weekdays only mean?
When enabled, only Monday–Friday are counted while advancing the due date. Holidays are still not auto-skipped.
Can I subtract days?
Enter zero or use a related difference tool if you need to measure backward from a deadline.
Will this match a bank SLA clock?
Only if the SLA also counts calendar or business days the same way and ignores unlisted holidays.