Date difference calculator
Enter two dates to compare their calendar interval. The result shows elapsed days, Monday-to-Friday dates within the period, and the interval in years, months and days. Public holidays are not deducted.
Compare two dates
How to read the results
Elapsed days are the difference between the two dates; the start date is not counted as an additional full day. The Monday-to-Friday count includes both endpoints and excludes only Saturdays and Sundays. The years-months-days interval accounts for months of different lengths and leap years.
Examples and uses
- From April 1 to April 10, 9 days elapse; the weekday count depends on the actual dates.
- For calendar age, compare a birth date with a reference date.
- For a countdown, compare today with the event date.
Business days and official deadlines
The weekday result does not remove public holidays. Business-day calendars, contractual periods and legal deadlines depend on the location and applicable rule. Check the relevant source before relying on a date for an official deadline.
Frequently asked questions
Do elapsed days include both dates?
No. They measure the interval between the dates. The weekday count includes both endpoints.
Can I enter the dates in reverse order?
Yes. The calculator sorts the dates and shows a positive interval.
Are public holidays excluded from weekdays?
No. Only Saturdays and Sundays are excluded. Public holidays vary by country and region.
Can this calculator determine a legal deadline?
No. It compares calendar dates. Rules for counting official deadlines vary by context.
Calculate another date
To add or subtract a duration from a date, use the date add and subtract calculator.