The Duration Calculator calculates the number of days, months and years between two dates.

The Time Duration Calculator will calculate the time that has elapsed/difference between two dates with time.

Days Calculator: Days Between Two Dates How many days, months, and years are there between two dates?

The Date Calculator adds or subtracts days, weeks, months and years from a given date.

Date to Date Calculator: Count days, weeks, months, and years between 2 dates. Business Days Calculator: Count working days or non-working days between 2 dates.

Explore our calculator & converter tools for date, time, astronomy, and more. Calculate years, months, or even seconds, or count the days to your deadline.

Add, Subtract, or Count Days Find the number of years, days, and even seconds between 2 points in time. Add or subtract any number of days or other time units. Then export, share, or …

Finds the day of the week for any date. Find out which day of the week you were born, or if the Moon landing was on a Saturday or a Sunday.

The Date Calculator allows you to calculate a date in the past or future by adding or subtracting any number of days, weeks, months, or years.

Use timeanddate.com's Date Calculator API to calculate dates or time spans, accounting for working days and days off (weekends & holidays in 230 countries).