Date Difference Calculator
A date calculator adds or subtracts days, weeks, months, or years from a date to find a resulting date. Useful for project deadlines, contract expiration dates, subscription renewals, legal deadlines, and age milestones.
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Pro Tip
The "30/360" convention used in finance assumes all months have 30 days and years have 360 days. It simplifies interest calculations but differs slightly from actual elapsed days.
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Did You Know?
The Gregorian calendar has 365.2425 days per year on average. This is achieved with the leap year rule: add a day every 4 years, except every 100 years, except every 400 years. The year 2000 was a leap year; 1900 was not.
References
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