[tz] [PROPOSED] Avoid backward links in zone.tab
Paul Eggert
eggert at cs.ucla.edu
Mon May 10 01:30:08 UTC 2021
On 5/9/21 3:41 AM, Michael H Deckers wrote:
>> +VN +1045+10640 Asia/Bangkok Vietnam (north)
>
>
> Asia/Hanoi was not added to backward/ as a link, so it
> seems to be inappropriate to add it to zone.tab.
Asia/Hanoi is different from most of the other cases, as the situation
with Hanoi was discovered after the guidelines were changed (so there
was no need to add Asia/Hanoi) whereas most of the other cases (e.g.,
America/St_Thomas) were added before that. For example, had the new
guideline been in place earlier, zone.tab would still have its current
line "VI +1821-06456 America/Port_of_Spain" even though there would be
no America/St_Thomas link in 'backward'.
By the way, that "VI +1821-06456 America/Port_of_Spain" is not right;
that line should refer to America/Puerto_Rico instead. Port-of-Spain and
San Juan, Puerto Rico have agreed since 1970 and the latter is bigger,
so America/Port_of_Spain should also be moved to 'backzone'. There are
several other examples like that, and we could shrink the installed set
of TZif files significantly if this sort of thing were fixed. I plan to
take a look into that.
> But if it is added, then the coordinates should not
> be those of Ho Chi Minh City but those of Hanoi:
> +2102+10551
Thanks, good point, I installed the attached. Although zone.tab is
deprecated I imagine some apps are still using it.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-Fix-north-Vietnam-lat-long.patch
Type: text/x-patch
Size: 1417 bytes
Desc: not available
URL: <http://mm.icann.org/pipermail/tz/attachments/20210509/09b6a540/0001-Fix-north-Vietnam-lat-long.patch>
More information about the tz
mailing list