What is the formula to calculate working days between two dates with Fridays & Saturdays as weekend!

Question

What is the formula to calculate working days between two dates on lists SharePoint? Keeping in mind that the working week here in Dubai is Sunday to Thursday - Fridays and Saturdays are the weekend. Please help. thanks

Answer 1

You can try this monstrosoty. Replace the date names (FirstDate and SecondDate) and the semicolons with commas if you get an error. This tests for WEEKDAY = 6 and 7 which are fridays and saturdays.

=IF(ISERROR(DATEDIF([D;];[SecondDate];"d"));"";(DATEDIF([FirstDate];[SecondDate];"d"))+1-INT(DATEDIF([FirstDate];[SecondDate];"d")/7)*2-IF((WEEKDAY([SecondDate])-WEEKDAY([FirstDate]))<0;2;0)-IF(OR(AND(WEEKDAY([SecondDate])=6;WEEKDAY([FirstDate])=6);AND(WEEKDAY([SecondDate])=7;WEEKDAY([FirstDate])=7));1;0)-IF(AND(WEEKDAY([FirstDate])=7;(WEEKDAY([SecondDate])-WEEKDAY([FirstDate]))>0);1;0)-IF(AND(NOT(WEEKDAY([FirstDate])=6);WEEKDAY([SecondDate])=6);1;0))