8380993: [REDO] Incorrect Interpretation of POSIX TZ Environment Variable on AIX

[sruthyjay]

This is a Backport PR : openjdk/jdk#31270

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Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8380993 needs maintainer approval

Issue

• JDK-8380993: [REDO] Incorrect Interpretation of POSIX TZ Environment Variable on AIX (Bug - P4 - Requested)

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[sruthyjay]

/approval JDK-8380993 request clean Backport to restore correct AIX timezone mapping for modern POSIX TZ strings, preventing incorrect GMT fallback while maintaining backward compatibility with low-risk, AIX-only changes and regression test coverage.

[bridgekeeper]

👋 Welcome back sruthyjay! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @sruthyjay This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[openjdk]

@sruthyjay
JDK-8380993: The approval request has been created successfully.

[mlbridge]

Webrevs

• 00: Full (92b03cbf)