Announcement: DSTv27 Timezone Patches Available for E-Business Suite 12.1
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If your E-Business Suite Release 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 November 2015 and released as DSTv25. DSTv27 is now available and certified with Oracle E-Business Suite Release 12.1. The DSTv27 update includes the
timezone information from the IANA tzdata 2016f. It is cumulative: it includes all previous Oracle DST updates.