On 2025-06-23 02:51, robertbastian--- via tz wrote:
Can Asia/Hanoi be added as a link in backward to ensure compatibility
No, because 'backward' is intended to be backward compatibility with older names in the primary files, not for compatibility with something else.
I see the confusion there, though. Perhaps we should move Asia/Hanoi to a new file named something like "addzone", for those who want to add extra zones not needed for any kind of compatibility with older tzdata.
