Days Between Dates Calculator
Count days, weeks, months, and working days between any two dates — or add and subtract days to find deadlines and key dates.
Mode
Days between
358
Weeks
51 + 1d
Working days (Mon–Fri)
256
From 2026-01-01 to 2026-12-25 is 358 days — 51 weeks and 1 days, or about 11 whole months. That includes 256 working days (Mondays to Fridays; public holidays not excluded).
Frequently asked questions
How are days between two dates counted?
As the number of calendar days from the start date to the end date — so Monday to the following Monday is 7 days. Leap days are handled automatically because the count uses real calendar dates.
What counts as a working day?
Mondays to Fridays after the start date, up to and including the end date. Public holidays vary by country and are not excluded, so subtract any that fall in your range.
How do I find a date 90 days from today?
Switch to 'Add / subtract days', enter your start date and 90. The calculator returns the exact date and its day of the week — useful for notice periods, returns windows, and contract deadlines. Use a negative number to count backwards.