Date calculators

Useful date answers, without guesswork.

Every calculation uses calendar dates directly, stays explicit about counting rules, and can be bookmarked or shared.

Compare two dates

Days between dates

Count calendar days and Monday–Friday weekdays, include or exclude endpoints, and see the span in calendar units.

Move through time

Shift a date by years, months, weeks, and days with predictable leap-year and month-end handling.

Date reference

See today's date, week and day numbers, useful formats, and quick future dates in a selected timezone.