[tz] zone.tab / zone1970.tab inconsistency for TF/UM/VN

Neil Fuller nfuller at google.com
Fri Mar 31 10:16:03 UTC 2017


This may be a misunderstanding on my part about the file formats of
zone.tab and zone1970.tab and how consistent they are expected to be.

I expect the exact zone IDs to be different, but there are only a few cases
where countries differ in the number of referenced zone IDs.

I realize that zone.tab is intended for backward compatibility but it looks
like it is being well maintained.

Is this difference expected? If it is, can somebody explain?

Details below the line.

Thanks for all the hard work.

Neil.

-------------------

2017b:

TF

zone.tab:

TF -492110+0701303 Indian/Kerguelen

zone1970.tab:

RE,TF -2052+05528 Indian/Reunion Réunion, Crozet, Scattered Islands
TF -492110+0701303 Indian/Kerguelen Kerguelen, St Paul Island, Amsterdam
Island

------------------

UM

zone.tab:

UM +2813-17722 Pacific/Midway Midway Islands
UM +1917+16637 Pacific/Wake Wake Island

zone1970.tab:

AS,UM -1416-17042 Pacific/Pago_Pago Samoa, Midway
UM +1917+16637 Pacific/Wake Wake Island
US,UM +211825-1575130 Pacific/Honolulu Hawaii

------------------

VN

zone.tab:

VN +1045+10640 Asia/Ho_Chi_Minh

zone1970.tab:

TH,KH,LA,VN +1345+10031 Asia/Bangkok Indochina (most areas)
VN +1045+10640 Asia/Ho_Chi_Minh Vietnam (south)

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