About the Date Calculator
The date difference calculator counts the exact number of calendar days between two dates, including or excluding weekends. It also breaks down the duration into years, months, and weeks for a more intuitive understanding.
How Business Days Are Counted
Business days (also called working days) exclude Saturdays and Sundays. Public holidays are not automatically excluded since these vary by country and region. Use the business days count as a baseline and adjust for local holidays manually.
Useful Date Facts
- A leap year occurs every 4 years (divisible by 4), except for century years not divisible by 400.
- The Gregorian calendar has 365 days in a regular year and 366 in a leap year.
- There are exactly 52 complete weeks plus 1 day (or 2 in a leap year) in a year.
- The average month has 30.44 days (365.25 ÷ 12).