Excel 2003 - Calculate working days and holidays

Hello and thanking you in advance for any responses

I am using excel 2003 and need to detremine the number of working days ( Monday to Friday) , excluding any holidays from the current date.

Excel 2003 does not have the functionality to do this with a set formula. (or am i missing something?)

I have set todays date using the Today() function in cell B2 and wish to use this to calculate overdue dates accordingly. My received dates are entered into (cell B3, continuing down the column) which is the date i wish make calculation from. The number of overdue days are to show in cell A3, and continuing down the same column. The number of overdue days is to increase each day.

My problem is that without having the "workdays" set formula I am having difficulties in setting a formula to exclude weekends and holidays.

Please advise, much appreciated and happy 2013

Regards

Meckenzie