About Date Difference Calculator
What It Does
Three date calculators in one page: find the difference between two dates, add or subtract days from a date, and calculate how long until or since any date.
Features
- Precise breakdown in years, months, and days
- Total days, weeks, and hours
- Add or subtract any number of days from a date
- Countdown: days until a future date or since a past date
- Accounts for varying month lengths and leap years
Privacy
Everything runs in your browser. No data is sent to any server.