Find the number of working days (Monday-Friday) between two dates, excluding weekends.
Business (working) days are calendar days that fall Monday through Friday. This is commonly used to estimate delivery times, contract deadlines, and payroll processing windows.
Business Days = Total Calendar Days - Weekend Days - Extra Holidays
Between a Monday and the Friday two weeks later (15 calendar days), there are 4 weekend days, leaving 11 business days - or fewer if holidays are subtracted.
Total calendar days minus weekends (and optionally holidays).
Only if it specifically includes a holiday calendar.
It gives a more realistic timeline than simple calendar days.