Date calculator
Days Between Dates.
Count days, weeks, and months between two dates
Date math depth
How this days between dates page differs
Each calculator type uses the same interactive shell, so the page adds type-specific examples, edge cases, and canonical boundaries to avoid becoming a duplicate utility surface.
Best use case
Best when you have two fixed calendar dates and need the elapsed full-day distance between them.
Worked example
January 1 to January 31 returns 30 full days because the start date is excluded and the end date closes the interval.
Edge cases this page calls out
Leap-day ranges include February 29 · DST changes do not add or remove calendar days · Reverse ranges return a negative distance
Canonical calculation boundary
This route keeps the answer focused on deterministic calendar math. It does not emit schema for user-entered dates and does not claim country-specific public-holiday closures.
Calculations are deterministic calendar math. User-entered dates stay in the browser component and are not turned into crawlable pages or structured data.
Popular countdowns
Public holidays by country
FAQ
Does this count the start and end dates?▾
This calculator counts the number of full days between the two dates. The start date is not counted, the end date is. For example, January 1 to January 3 = 2 days.
Does it account for leap years?▾
Yes. The calculation uses actual calendar dates, so February 29 in leap years is included when it falls within the range.