Daylight Saving Time Issues on Oracle WebLogic Server

The Java platform no longer supports these three-letter time zones — EST, EDT, HST, HDT, MST, and MDT — and has replaced them with Olson time zones such as Americas\New_York. PeopleTools functionality is not affected by this change; however, your Oracle WebLogic Server might be affected. As a result, daylight saving time is calculated incorrectly by Oracle WebLogic Server for these time zones under certain circumstances.

For more information, see Timezones, Daylight Savings, and the TZupdater for the Java Runtime Environment (JRE)