Calendar duration
Days Between Dates Calculator
Calculate the number of days between two calendar dates with clear inclusive-counting options.
Days between—Loading today's date…
How this calculator works
Dates are converted to UTC calendar midnights before subtraction, which avoids daylight-saving-time distortions.
The standard difference excludes the start date. You can separately see the count when both dates are included.
The tool is arithmetic only. Where legal, payroll, holiday, timezone or jurisdiction-specific rules matter, the page states what is and is not included.
Frequently asked questions
Why can inclusive counting differ by one day?
A date difference measures elapsed boundaries. Counting both named calendar dates adds one to the absolute difference.
Does daylight saving time affect the result?
No. The calculation uses calendar dates at UTC midnight rather than local elapsed hours.