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Date difference calculator
Count elapsed calendar days between two dates, including leap days.
How to use
Choose start and end dates. A negative result means the end date is earlier.
Calculation method
(UTC₂ − UTC₁) ÷ 86 400 000Example
2024-02-28 → 2024-03-01 = 2
Questions
What should I check?
The end day is not counted inclusively. This is calendar-day arithmetic, not working days or elapsed hours.