Date Difference Calculator
Count the days, weeks, and months between two dates.
Days
From 2026-01-01 to 2026-10-03 is 275 days (39.3 weeks, 9 calendar months).
Weeks
39.3
Calendar months
9
Worked example
From 1 January 2026 to 3 October 2026 is 275 days, about 39.3 weeks, and 9 calendar months.
FAQ
- Are the start and end dates included?
- The day count is the difference between the two dates. From a date to the same date is 0 days.
- How are calendar months counted?
- Whole months are counted from the start date. If the end day is earlier in the month than the start day, the last partial month isn't counted.
- Does this account for time zones?
- No. Both dates are treated as local calendar dates, with no time of day.