On 9/20/21 5:34 AM, Almaz Mingaleev wrote:
> Thanks for the patch, Paul.
> I've applied it, but it is not what zone.tab was in 2021a

Thanks for checking. Unfortunately I overlooked one of the important
commits since 2021a. I fixed that and came up with the attached patch;
please try that instead.

> Is it safe to revert zone.tab to what it was in 2021a
> <https://github.com/eggert/tz/blob/3831c591e188edc16d1a6855fb20ebee78c4e27b/zone.tab>

Almost, but that misses the post-2021a replacement of Enderbury with
Kanton.  Here are the changes from 2021a to the zone.tab that results
from applying the attached patch to the current main branch of the
development repository:

diff --git a/zone.tab b/zone.tab
index 1f0128f..3d4a7f7 100644
--- a/zone.tab
+++ b/zone.tab
@@ -3,7 +3,7 @@
  # This file is in the public domain, so clarified as of
  # 2009-05-17 by Arthur David Olson.
  #
-# From Paul Eggert (2018-06-27):
+# From Paul Eggert (2021-09-20):
  # This file is intended as a backward-compatibility aid for older
programs.
  # New programs should use zone1970.tab.  This file is like
zone1970.tab (see
  # zone1970.tab's comments), but with the following additional
restrictions:
@@ -16,6 +16,9 @@
  # clocks have agreed since 1970; this is a narrower definition than
  # that of zone1970.tab.
  #
+# Unlike zone1970.tab, a row's third column can be a Link from
+# 'backward' instead of a Zone,
+#
  # This table is intended as an aid for users, to help them select
timezones
  # appropriate for their practical needs.  It is not intended to take or
  # endorse any position on legal or territorial claims.
@@ -228,7 +231,7 @@ KE  -0117+03649     Africa/Nairobi
  KG    +4254+07436     Asia/Bishkek
  KH    +1133+10455     Asia/Phnom_Penh
  KI    +0125+17300     Pacific/Tarawa  Gilbert Islands
-KI     -0308-17105     Pacific/Enderbury       Phoenix Islands
+KI     -0247-17143     Pacific/Kanton  Phoenix Islands
  KI    +0152-15720     Pacific/Kiritimati      Line Islands
  KM    -1141+04316     Indian/Comoro
  KN    +1718-06243     America/St_Kitts
@@ -391,7 +394,7 @@ TK  -0922-17114     Pacific/Fakaofo
  TL    -0833+12535     Asia/Dili
  TM    +3757+05823     Asia/Ashgabat
  TN    +3648+01011     Africa/Tunis
-TO     -2110-17510     Pacific/Tongatapu
+TO     -210800-1751200 Pacific/Tongatapu
  TR    +4101+02858     Europe/Istanbul
  TT    +1039-06131     America/Port_of_Spain
  TV    -0831+17913     Pacific/Funafuti