Are your timezone definition files up-to-date?
By LuciaC-Oracle on Feb 05, 2013
If your E-Business Suite Release 11i or 12 environment is configured to support Daylight Saving Time (DST) or international time zones, it's important to keep your timezone definition files up-to-date. They were last changed in July 2012 and released as DSTv18.
DSTv19 is now available and certified with Oracle E-Business Suite Release 11i and 12. The DSTv19 update includes the timezone information from Olson tzdata 2012j and is cumulative: it includes all previous Oracle DST updates. For details on whether you should apply the new DSTv19 definitions and how to obtain them, read the E-Business Suite Technology blog: Latest DSTv19 Timezone Patches Available for E-Business Suite