Hi,
On 2026-05-27 20:42, Ash Forsyth wrote:
> Package: tzdata
> Version: 2026b-0+deb13u1
> Severity: normal
>
> The file /usr/share/zoneinfo/zone1970.tab contains a corrupted row that
> tags Asia/Tokyo with both the JP and AU country codes:
>
> JP,AU +353916+1394441 Asia/Tokyo Eyre Bird Observatory
I think this is actually correct. zone1970.tab group zones so that each
row stands for a timezone where civil timestamps have agreed since 1970.
It means that both Tokyo and the Eyre Bird Observatory got the same time
since 1970.
> The coordinates (+35°39'16", +139°44'41") point to Tokyo, Japan — not
> to the Eyre Bird Observatory, which is located in Western Australia
> (approximately -32°15', +126°18'). It looks like two separate rows
> were merged: the real Tokyo entry (JP, Asia/Tokyo) and a missing
> Australian entry for Eyre Bird Observatory (probably AU,
> Australia/Eucla).
This is also correct. In case multiple countries are covered by the same
row, the most populous city is used, and that country is listed first.
See the header of that file for more details.
> The user-visible effect: TZInfo::Country.get("AU").zone_identifiers in
> Ruby (and equivalent calls in other tz libraries) now lists Asia/Tokyo
> as an Australian zone. Application code that enumerates "all
> timezones in Australia" gets Tokyo, Osaka, and Sapporo mixed in.
This should probably use zone.tab instead, which does not try to group
timezones. Indeed there are two distinct entries there:
AU -3143+12852 Australia/Eucla Western Australia (Eucla)
...
JP +353916+1394441 Asia/Tokyo
Regards
Aurelien
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
[email protected] http://aurel32.net
