How the countdown works
The countdown shows the number of whole days from today to the target date. If the date has passed, it shows how many days ago it was.
Should I include the end date?
From March 1 to March 10 is 9 days apart, but if you are counting days of a trip, leave or a rental where both the first and last day count, it is 10 days. Tick "include the end date" for that.
Weeks and business days
The result also shows the span in weeks. To estimate working days, multiply the number of weeks by five and adjust for public holidays in your country.