Suppose, you have been given a year in A1 (Say A1 = 2016) and you need to determine the number of working days in a Year, then your formula to determine number of working days would be -


The above formula is based on the fact that Saturdays and Sundays are weekends. Starting Excel 2010, you can control the weekends in the formula and function is NETWORKDAYS.INTL


In the string "000110" - First digit is Monday and last digit is Sunday. 1 defines that particular day as weekend.

If you have got your list of holidays in a range say B1:B20 (B1:B20 should contain dates in date format), you can have following formulas