Is this concept even possible?

Before I even attempt to work on this code, I wanted to see if you guys think it's even possible:
Let's say there are three 24-hour shifts from 8AM to 7:59:59 the next day (1Unit, 2Unit and 3Unit). This reoccurs forever and never changes. Can I calculate what shift it is based on the current date and time?
Basically I would run this script and it would create a text/Excel file that just has one entry in it. The current shift.
I can do this without the times but the whole 8AM to 7:59:59 is confusing the heck out of me.
 

startDate=CDate("2012/01/25") todayDate=CDate("2012/02/16") daysPassed=(DateDiff("d",startDate,todayDate)) remainder = (daysPassed - 1) mod 3 if remainder = 0 then	WScript.Echo "2 Unit" elseif remainder = 1 then	WScript.Echo "3 Unit" elseif remainder = 2 then 	WScript.Echo "1 Unit" End If

 
Thank you!
 
PS: How do I post code and retain my carriage returns?

I think I'm just going to make this a scheduled task so this can be considered closed.