Ref. specific data

["jgholson" <jgholson@xxxx>]

Guys/Gals:

this may have been asked...if it has i apologize:

Is there a way to refrence specific data in AB? In other words if I 
want the close on January 3rd to be refrenced to start my 
calculation. I also need to use the specific date to make a 
calculation. I actually want to calculate market days between 
specific dates.

any help would be greatly appreciated!

Thanks
JG