Date calculators

Useful date answers, without guesswork.

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

Count down to a date

How many days until?

Count calendar days, full weeks, and Monday–Friday weekdays until any target date with a shareable result.

Compare two 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.

Plan working deadlines

Count or shift working days while excluding weekends and verified U.S. or Canadian national holidays.

Measure a lifetime

Calculate exact age in years, months, and days, total days lived, and the countdown to the next birthday.

Date reference

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