Date & Time Calculator

Calculate date differences, add or subtract dates and more

📅 DIFFERENCE · ADD/SUBTRACT · DAY FINDER

Start Date

End Date

Start Date

Operation

Amount

Unit

Select a Date

Find out what day of the week this date falls on

What is a Date & Time Calculator?

A Date & Time Calculator is a free online tool that helps you work out the difference between two dates, calculate a future or past date by adding or subtracting a number of days, weeks, months or years, and find out what day of the week any date falls on. It is useful for planning events, calculating deadlines, tracking project timelines and much more.