This is a leftover when we introduced "dayperiods" in the JDK ([JDK-8247781](https://bugs.openjdk.org/browse/JDK-8247781)). The CLDR Converter was modified to generate patterns for SimpleDateFormat for dayperiods (simply replacing them with ampm), and the same processing should have been applied to Host provider on mac, which also uses LDML patterns. As in the bug report, macos recently started using dayperiods, thus the issue was revealed. Regression test is not provided as it would require the macos's default locale should be configured to zh_TW. I have manually confirmed that the proposed fix would work for the problem case.
------------- Commit messages: - initial commit Changes: https://git.openjdk.org/jdk/pull/28181/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28181&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8371339 Stats: 12 lines in 1 file changed: 11 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/28181.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/28181/head:pull/28181 PR: https://git.openjdk.org/jdk/pull/28181
