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Date Calculator

Calculate date differences or find dates before/after a specific number of days.

What is Date Calculator?

Date Calculator is a tool that calculates the difference between two dates or finds dates before/after a specific number of days from a given date. It's useful for D-day calculations, project scheduling, and anniversary calculations.

Key Features

  • Display date differences in years, months, days, weeks, and total days
  • Calculate future dates by adding days to a specific date
  • Calculate past dates by subtracting days from a specific date
  • Automatic day of week display and copy calculation results
  • Business day calculation option considering holidays and weekends

How to Use

  1. 1Date Difference: Select start and end dates to automatically calculate the difference
  2. 2Add Days: Select a base date and enter the number of days to add
  3. 3Subtract Days: Select a base date and enter the number of days to subtract

Use Cases

Date Calculator is useful in the following situations:

  • D-day calculations (exams, weddings, events, etc.)
  • Project schedule management and deadline calculations
  • Anniversary and birthday calculations
  • Contract period and rental period calculations
  • Pregnancy week and due date calculations

Usage Tips

  • Use the business days option to exclude weekends and holidays for work-related calculations
  • Enter negative numbers to calculate past dates
  • Consider local time when calculating dates across different time zones