Date Calculator

Calculate the difference between dates or add/subtract time from a date.

Use negative values to subtract time
About Date Calculations
What is a Date Calculator?

A date calculator helps you determine the time between two dates, add or subtract time from a date, or find the day of the week for any date.

Common Date Calculations
  • Date Difference: Find the exact duration between two dates in various formats (days, weeks, months, years)
  • Date Addition/Subtraction: Calculate a future or past date by adding or subtracting a specified amount of time
  • Day of Week: Determine which day of the week (Monday, Tuesday, etc.) a specific date falls on
Practical Applications
  • Project Planning: Calculate project timelines and deadlines
  • Age Calculation: Determine exact age in years, months, and days
  • Event Planning: Calculate days until or since important events
  • Legal Matters: Determine dates for legal deadlines or contract periods
  • Financial Planning: Calculate loan terms, investment periods, or payment schedules
Note: This calculator handles dates in the Gregorian calendar and accounts for leap years. Results may vary for very distant dates or when crossing historical calendar changes.