Date & Time Calculators

Calculate age on a specified date.

Find the signed and absolute difference between two dates.

Count weekdays between two dates.

Measure a date-based countdown from an explicit starting date.

Calculate elapsed wall-clock time between two times.

Calculate worked time after an unpaid break.

Find the ISO week number for a date.

Add calendar or weekday-only days to a start date.

Compare two explicit UTC offsets.

Count signed calendar days until a target date.

Add or subtract a whole number of calendar days from a start date.

Add or subtract whole months while clamping end-of-month overflow.

Find the weekday name and number for a calendar date.

Count Monday–Friday weekdays in a calendar month.

Project the next and Nth payday from a start date and pay-cycle length.