📅 Date Calculator
Calculate days between dates, D-day countdown, business days, or add/subtract days from a date.
📊 Days Between
🎯 D-Day
➕ Add/Subtract
💼 Business Days
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days
📖 What Is a Date Calculator?
A date calculator helps you find the difference between two dates, add or subtract days from a date, and calculate business days excluding weekends and holidays. Essential for project management, contract deadlines, event planning, and tracking D-days or countdowns.
Our calculator handles complex scenarios like leap years and month-end boundaries. All processing is done locally in your browser.
🚀 How to Use This Tool
- Select a start date and end date
- View the difference in days, weeks, months, and years
- Or add/subtract a number of days from a date
- Toggle business days mode to exclude weekends
💡 Tips & Best Practices
Planning Tip: For project deadlines, always calculate in business days to account for weekends. Add buffer days (10-20%) for unexpected delays.