Choose exactly which endpoints count and see weekdays and weekend days across the resulting range.
Calculate with the Days Between Dates Calculator
Dates are validated as calendar components before calculation.
Days Between Dates Calculator results
How to use the Days Between Dates Calculator
- Enter the required calendar dates, times, or rule values.
- Choose the counting convention or mode where offered.
- Select Calculate or press Enter.
- Review the result, basis, and limitations before using it.
Worked example
1 August to 2 August has a difference of 1 day; including both dates counts 2 dates.
Assumptions
Date-only calculations use the proleptic Gregorian calendar and ignore clock time. Elapsed-time calculations and selected-zone conversions state their time basis separately.
Limitations
- Weekend means Saturday and Sunday on this page.
- Reversed inputs are normalized and reported.
Frequently asked questions
What date basis does the Days Between Dates Calculator use?
The result uses calendar dates unless the page explicitly describes elapsed time or a selected time zone.
Can daylight-saving time change calendar-day totals?
No. Date-only calculations use normalized UTC day numbers. Elapsed timestamp and time-zone calculations are explicitly handled separately.
Are entered dates stored?
No. Calculations run in your browser and the entered dates are not saved or sent anywhere.