Count the total days, weekdays and weekend days between two dates.
The count is the plain difference between the two dates (End − Start), so the start date itself isn't counted as a separate day — this matches the standard "nights between two dates" style of counting.
Saturday and Sunday are classified as weekend days; Monday through Friday are classified as weekdays. Each day in the range is checked individually and added to one count or the other.
No — the end date must be on or after the start date, or the calculator shows a validation message instead of a result. Swap the two dates if you entered them in the wrong order.