Days between dates · Add or subtract days
Date Calculator
A clear answer, with the counting rules in plain sight.
Calendar days
Calendar days include weekends and holidays. A countdown will ask you to choose a time and time zone.
Your last calculation is saved on this device.
What gets counted?
From Monday to Tuesday is one calendar day. Including the end date counts both Monday and Tuesday, giving two days. The same date gives zero days, or one when the end date is included.
When the end date comes first, the result is negative and counts backward. Adding or subtracting days always moves by whole calendar dates, so daylight saving changes do not change the answer.