Missing “Day” Labels in Outlook 2003

I have an odd issue. A coworker’s calendar is not displaying the day when viewing in day/week/month view. For example, if viewing the work week, the top of each day should be Wednesday, February 27, but hers only shows February 27. I thought it was an issue with Windows, where her long date format was messed up in the Control Panel, but it is as it should be. Anyone else see this before?