NET WORK DAYS Between 1 Fixed And 1 Variable Date

Im wanting to calculate then no of days between 2 dates. The first one is variable.

Date 1: (Contract start date) Either the date entered in a cell A1, or 01/04/2008 - whichever is later

Date 2: (Contract end date) Date entered in cell A2.

example 1:

Date 1 = 1/1/8
Date 2 = 31/12/8

In the above example i would want the calculation to work out the n o. of working days between 1/4/8 and 31/12/8

example 2:

Date 1 = 1/5/8
Date 2 = 31/12/8

In the above example i would want the calculation to work out the n o. of working days between 1/5/8 and 31/12/8


This will allow me to calculate the number of contract days in this financial year, even if date 1 was in last financial year.