Time & Date Calculators

Add or subtract a number of days from a date.

Calculate exact age in years, months, weeks, days, hours, and minutes — plus a countdown to your next birthday.

Count weekdays (Mon–Fri) between two dates.

Count down to a specific date in every unit that matters.

Find the exact number of years, months, weeks, days, hours, and minutes between two dates.

Find what day of the week any date falls on.

Find how many days remain until a future date — plus weeks, hours, and minutes.

Check whether a given year is a leap year.

Convert 24-hour military time to standard 12-hour time.

Sum five daily hour totals into a weekly total.

Calculate the duration between two times on the same day.

Convert a time from one UTC offset to another.

Convert between a Unix timestamp and a calendar date.

Find the ISO week number for any date.

Calculate hours worked from clock-in and clock-out times.