Days Between Dates
Count calendar days between two dates in your browser.
Tool workspace
Uses calendar dates in your browser (UTC-noon math so DST does not invent phantom days). Exclusive counts the gap; inclusive counts both endpoints.
How it works
Pick a start and end date. Exclusive mode counts the gap between dates (Jan 1 → Jan 2 = 1). Inclusive mode counts both endpoints (Jan 1 → Jan 2 = 2).
Calendar math uses UTC noon for each date so daylight-saving transitions do not invent phantom days. Empty fields clear the result—no error. Invalid dates show a validation message.
Timezone note: you enter calendar dates (not clock times); results are calendar-day counts.
Calendar math uses UTC noon for each date so daylight-saving transitions do not invent phantom days. Empty fields clear the result—no error. Invalid dates show a validation message.
Timezone note: you enter calendar dates (not clock times); results are calendar-day counts.
Examples
- 2024-01-01 → 2024-01-02 exclusive = 1 day
- 2024-01-01 → 2024-01-02 inclusive = 2 days
Privacy
Privacy: this tool processes dates locally in your browser. We do not log or store what you enter. Login is not required.
FAQ
Are my dates uploaded?
No. Calculation runs entirely in your browser.
Does DST change the day count?
No. Dates are treated as calendar days at UTC noon so DST does not add or remove days.
Do I need an account?
No. All published tools work for guests without login.