Inclusive Date Difference
Days between two dates, counting both ends
The count that includes the first day and the last — what a hotel bill, a jury summons, a sick note or a "within 30 days" clause almost always means.
Questions people ask
The things that come up about inclusive date differences, answered plainly.
When should I count inclusively?
Whenever the days themselves are the thing being counted — days of leave taken, nights charged, days of a festival. Count exclusively when you are measuring the distance to a deadline.
Is a week seven inclusive days or eight?
Monday to the following Monday is seven days exclusive and eight inclusive. A working week — Monday to Friday — is five inclusive days, which is why leave is nearly always counted this way.
Related tools
How far apart two instants are — in whichever unit you need, counting every day or only the working ones.
Exclusive Date DifferenceThe subtraction answer — the distance from one date to another, which is what a deadline, an age and every date library mean by a difference.
Days Between DatesA plain day count, with the weekday split beside it and the inclusive answer stated too — because half the time "days between" means one more than subtraction gives.
Business Days CalculatorWeekends out, public holidays out, and the ones it removed listed by name — so you can see whether the calendar you picked is the one your contract means.
Date Duration CalculatorThe duration of a range stated the way a person would state it, plus the exact totals underneath and a census of which weekdays fall inside it.