Date Calculator
Calculate the difference between dates or add/subtract days, weeks, months, and years.
Date Calculator
Time Period
Detailed Breakdown
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About Date Calculator
The Date Calculator helps you perform two common date operations: finding the difference between two dates and adding or subtracting a time interval from a given date.
Date Difference Calculator
The Date Difference calculator determines the exact duration between two dates. This can help you with:
- Planning project timelines
- Determining contract durations
- Calculating age or anniversary milestones
- Measuring progress over time
By default, the end date is excluded from the count. If you want to include the end date in the calculation (counting both the start and end days), select the "Count the end date in the result" option.
Add/Subtract Date Calculator
The Add/Subtract Date calculator allows you to find a future or past date by adding or subtracting a specific time interval from a base date. This is useful for:
- Calculating future deadline dates
- Determining warranty expiration dates
- Planning events in advance
- Tracking recurring schedule intervals
Date Interpretations
When working with date calculations, keep in mind:
- The calculator accounts for varying month lengths
- Leap years are automatically factored into calculations
- When adding or subtracting months that would result in an invalid date (e.g., adding 1 month to January 31 would give February 31, which doesn't exist), the calculator adjusts to the last valid date of the month (February 28 or 29 in a leap year)