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Inputs remain on your device.
Days Between Dates Calculator
Calculate elapsed days, weeks, approximate months and exact calendar difference.
Calculations happen locally; dates and time zones are not transmitted.
How to use the days between dates
- 1
Enter the required dates, times or options.
- 2
Select Calculate to run the operation locally.
- 3
Review and copy each format or print the result.
Calendar accuracy in your browser
Explicit rules
Validates ranges, leap years and month changes.
International formats
Uses Intl and IANA to localize results.
Frequently asked questions
Are both dates included?
The difference counts elapsed full days; the displayed exact difference uses calendar units.
Are my dates sent to a server?
No. Every operation runs in your browser.
Which calendar is used?
It uses the Gregorian calendar and dates from years 1 through 9999.