Another DST “bug” to be aware of this week: if you use dual time zones in Outlook and the week view (starting on Sunday), the time offset may be wrong all week. To correct it, use work week or day view instead.

For example, if your default time zone is Central and Eastern is your secondary time, when Sunday rolls around, the time scale incorrectly displays a 2 hr time difference all day. If you use a multi-day view with Sunday as the first day, Sunday’s time scale is used, so it appears there is a 2 hour time difference each day.

For more information, see
http://www.slipstick.com/calendar/dst_week.asp