Dates & age calculator
Date difference calculator
Count the number of calendar days between two dates, including leap days.
Formula and example
Elapsed days = end calendar date − start calendar date. Reversed dates are reported as an absolute difference.
Worked example
The day count is the elapsed number of midnights from the start date to the end date. The start date itself is not counted as a full elapsed day.
Assumptions and limits
Counts elapsed calendar days and excludes the starting day. It does not count both endpoints inclusively.
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