JDK-8342463 : Release Note: Remove JDK1.1 Compatible Behavior for "EST", "MST", and "HST" Time Zones
  • Type: Sub-task
  • Component: core-libs
  • Affected Version: 24
  • Priority: P4
  • Status: Resolved
  • Resolution: Delivered
  • Submitted: 2024-10-16
  • Updated: 2025-02-14
  • Resolved: 2024-10-21
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JDK 24
24Resolved
Description
The JDK 1.1-compatible behavior for the "EST," "MST," and "HST" time zones has been removed. Previously, this behavior could be enabled using the `sun.timezone.ids.oldmapping` system property, but this property is no longer operational in this release. In general, the use of all legacy [Three-letter time zone IDs](https://docs.oracle.com/en/java/javase/24/docs/api/java.base/java/util/TimeZone.html#three-letter-time-zone-ids-heading) is deprecated. Instead, use the corresponding region-based time zone IDs listed in [ZoneId.SHORT_IDS](https://docs.oracle.com/en/java/javase/24/docs/api/java.base/java/time/ZoneId.html#SHORT_IDS).