How it's calculated
Result = Start ± N days
Start = start date, N = number of days, Result = resulting date. Add days when counting forward, subtract when counting before. Calendar mode counts every day; business mode steps only Monday–Friday.
Common questions
What date is six months from today?
It lands on the same day number six calendar months ahead, and the tool shifts it if that month is shorter, like the end of February.
Can I count only working days?
Yes, switch to business days and weekends are skipped in the count.