Date and Time Tools

Calculate the exact time between two dates in years, months, weeks and days.

Calculate your exact age in years, months and days from your date of birth, plus days until your next birthday.

Add or subtract days, weeks, months or years from any date and see the resulting date.

A simple online countdown timer with alarm. Set hours, minutes and seconds and start counting down.

A precise online stopwatch with lap times. Start, pause, resume and record laps.

Convert Unix timestamps to human-readable dates and back. Supports seconds and milliseconds.

Find the ISO week number of today or any date, and see the full week calendar of the year.

Find out what day of the week any date falls on - past, present or future.

Count business days between two dates, excluding weekends and optional custom holidays.

Convert times between time zones around the world. Compare multiple cities at once.

See the current time in major cities around the world, updated live every second.

Calculate the duration between two times of day - great for timesheets and work hours.

Check whether any year is a leap year and see the list of upcoming leap years.

Count down the days until any future date - birthdays, holidays, deadlines and events.

Add and subtract time durations (hours, minutes, seconds) with a running total.