how to loop through queries for different time zones

I am working on a script that will send out daily messages to an individual who has subscribed to a particular company’s daily message.

The subscribers table has:

• Firstname
• Email
• Company ID
  Delivery method
  • Desktop
  • Phone  

I have set up a query that pulls the subscribers information to:

1. Determine which business
   1. Which layout to use (contact_id)
   2. Determines time zone
      1. Phones will be sent at a later time than the desktop
2. Which version to send:
   1. Desktop with all graphics
   2. Phone with graphics removed

I can use a cfloop to send the message out every morning, I just don’t know how to efficiently send out the message by the different time zones.

Each time zone will have 2 diff times:

1. 5:00am for the desktop
2. 8:00am for the phones

Any suggestions would be helpful.