Date Calculator Add or subtract days, months, or years to or from a specific date.

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

Date Calculator API Find a specific business date and calculate the working days in a given period.

World time and date for cities in all time zones. International time right now. Takes into account all DST clock changes.

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 or subtract any number of days to/from a date, taking into account public holidays in your country and weekends.

Calendars – online and print friendly – for any year and month and including public holidays and observances for countries worldwide.

Overview of holidays and many observances in the United States during the year 2026

From and including: Tuesday, January 13, 2026 To, but not including Tuesday, January 13, 2026 Result: 0 days It is 0 days from the start date to the end date, but not including the end date.

Date Calculator – Add or subtract days, months, years Birthday Calculator – Find when you are 1 billion seconds old Related Links Calendar & Holidays Overview – Explore calendar tools …