Days Between Dates & Business Day Calculator

Calculate days between dates, add or subtract days and find business-day targets with weekend rules. National holidays are not excluded.

When to use this tool

Find calendar days until a deadline or a target date after a number of weekdays.

Input: 2026-01-01 → 2026-01-08, end date not included: Result: 7 calendar days = 1 week, 0 days; 5 weekdays excluding Saturday/Sunday

Comparing 2026-01-01 → 2026-01-08
Counting rule	Days
Calendar-day difference	7
Include end date	8
Exclude Saturday/Sunday and end date	5

Months in the duration view are approximate, using an average month length. This is not legal or medical date advice; check endpoint settings and holiday rules yourself.

Are national holidays excluded automatically?

No. Business-day calculations use weekends; national holiday calendars are not included.

What changes when Include End Date is enabled?

One day is added to the date difference. January 1 to January 8 is seven days by default, or eight with the end date included.