Got an email from the USV & thought I'd pass along some links... # rpm -qa | grep tzdata tzdata-2005m-1.EL4 RedHat DST Info - RHKB http://kbase.redhat.com/faq/FAQ_80_7909.shtm RHEL3 DST Info - RHKB http://kbase.redhat.com/faq/FAQ_79_9950 RHEL4 DST Info - RHKB http://kbase.redhat.com/faq/FAQ_85_9951 Daylight Saving Time - When do we change our clocks? http://webexhibits.org/daylightsaving/b.html http://en.wikipedia.org/wiki/Daylight_saving_time