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Date Difference Calculator

Calculate the exact duration between two dates in years, months, and days. Perfect for planning events, tracking projects, or historical research.

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This tool runs entirely in your browser. No data is sent to any server, ensuring your information remains private and secure.

About Date Difference Calculator

Calculate the exact duration between two dates in years, months, and days. Perfect for planning events, tracking projects, or historical research.

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Does it include the end date? expand_more

The calculation typically measures the duration *between* dates. If you want to include the last day, simply add one day to the result.

Does it handle leap years? expand_more

Yes! The tool uses the native calendar system to correctly account for leap years and varying month lengths.

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Project Management: Calculate duration between project start and end dates.

Travel Planning: Find out exactly how long your trip will be.

Event Countdown: See how many days are left until a big event.

Historical Research: Calculate time spans between historical dates.