📆 Date Calculator

Duration between two dates, add or subtract days, exclude weekends, presets for 7 / 30 / 90 / 100-day milestones.

Duration between dates

Start

End

Exclude weekends

Add or subtract days

From

± days

How it works

Day arithmetic on the proleptic Gregorian calendar, ignoring time zones. "Exclude weekends" treats Saturday and Sunday as zero-day skips, which approximates business days; public holidays are not subtracted.