What date and time was before?

Subtract minutes, hours, days or weeks from any date and time.

Subtract a duration

Enter or select values to calculate a result.

Choose a reference date and a duration. The calculation returns the earlier local date and time.

For shared results, include the time zone and full date.

Find an earlier date by removing a duration from a known starting point.

Calculate the exact clock time a number of hours before another time.

Find the calendar date a specified number of days before another date.

Move backward by complete seven-day periods.

Count backward while excluding weekends and applicable holidays.

Understand the difference between a relation to an event and a relation to now.