Date Calculator
Free online date calculator to find days between dates, calculate due dates, add/subtract days. Date and time calculator for planning, scheduling, and date calculations.
Date Calculator
Calculate the difference between two dates or add/subtract days from a date.
Please enter valid dates.
Calculation Result:
How to Use the Date Calculator?
Choose between calculating the difference between two dates or adding/subtracting days from a date. Enter the required dates and click Calculate to get your result.
Rules and Notes
1. Date Format
Dates should be entered in YYYY-MM-DD format (e.g., 2024-01-15).
2. Date Range
The calculator supports dates from year 1 to year 9999.
3. Leap Years
Leap years are automatically handled in calculations.
4. Business Days
The calculator includes weekends and holidays in day counts.
Date Calculation Methods
- Date Difference: End Date - Start Date = Number of days
- Date Addition: Original Date + Number of days = New Date
- Date Subtraction: Original Date - Number of days = New Date
- Leap Year: A year is a leap year if it's divisible by 4, but not by 100, unless it's also divisible by 400.
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