View, Arrange By, Current View, Customize Current View, Other settings.
Uncheck the box marked "Compress Weekend Days".
If you're using a version of Outlook older than 2003, the menu options are
"View, Current view, Customize Current View, Other SEttings".

Signature
Patricia Cardoza
Outlook MVP
Author - Special Edition Using Microsoft Office Outlook 2003
Lead Author - Access 2003 VBA Programmer's Reference
Author - Absolute Beginner's Guide to Microsoft OneNote 2003
http://blogs.officezealot.com/cardoza
> My Saturday & Sunday show up split on-screen and when
> printing out a monthly calendar.
[quoted text clipped - 8 lines]
> XP
> Outlook XP