Exclude weekends and holidays from a formula.

Can anyone help? I have been asked to create a worksheet to calculate the percentage of the utilisation of a number of loan cars per month. Each of the cars may be used on each and every day of the week but the percentage utilisation is to be calculated on working days only. However it is essential to record the name of the driver of the car at weekends and holidays. Column A is populated with the dates of the month. Colum B is populated with the relative days of the week. In column C and subsequent columns I record the name of the driver of a particular car registration. Is there any way that I can count the number of drivers of each car on working days only and not weekends or bank holidays?