Date Calculator

Calculate date differences, add or subtract time periods

Get precise date calculations with business days and detailed breakdowns

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Date Calculator Settings

Choose your calculation type and enter dates

Calculation Type

Start Date

End Date

This date calculator helps you find the difference between dates, add or subtract time periods, and calculate business days. Perfect for project planning, vacation calculations, and scheduling.

Did You Know?

The Julian Day system, used by astronomers, counts days continuously since January 1, 4713 BCE, making it easier to calculate time intervals across different calendar systems.

Leap years were introduced by Julius Caesar in 45 BCE, but the current system was refined by Pope Gregory XIII in 1582 to account for the Earth's actual orbital period.

Different cultures have used various calendar systems throughout history, from the Mayan Long Count to the Chinese lunar calendar, each with unique ways of measuring time.

These facts help provide context and educational value about the tool's purpose and history.