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This repository was archived by the owner on May 26, 2026. It is now read-only.
This repository was archived by the owner on May 26, 2026. It is now read-only.

[Android 7] AndroidTimeZonesTest.testLoadSystemTimezones fails for Asia/Hanoi #318

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@rfc2822

Asia/Hanoi is available on the system, but not in ical4j.

So a user could select Asia/Hanoi in their calendar app for an event, but then ical4j can't load VTIMEZONE data for that timezone.

We should make sure that this is either no problem (then the test could for instance only print a warning), or fix it.

To test: Start Android 7 emulator, add event in Asia/Hanoi to calendar app, sync.

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  1. added
    eventsRegarding events / everything that's stored in Android Calendar Provider
    on Apr 11, 2026
  2. added theissue type on Apr 11, 2026
  3. self-assigned this
    on Apr 14, 2026
  4. rfc2822 commented on Apr 14, 2026

    @rfc2822
    MemberAuthor

    When Asia/Hanoi is somehow used for an event in Android 7 (it's not offered by the AOSP Calendar, didn't check other ones), synctools ignores the missing VTIMEZONE and just doesn't write a VTIMEZONE.

    So I think it's safe to print it as a warning.

  5. linked a pull request that will close this issueMove AndroidTimeZonesTest and improve logging #322on Apr 14, 2026
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