https://github.com/eggert/tz/commit/c53fe556dd48694e8e6dcd5e5881925c783528fe

From c53fe556dd48694e8e6dcd5e5881925c783528fe Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sun, 1 Nov 2026 20:02:27 -0800
Subject: [PATCH] Revert zonenow.tab to 2026a, mostly

Coalesce regions that as of today are identical for the planned future.
This undoes most of the temporary zonenow.tab changes that were
needed only from March to today, by reverting zonenow.tab to the
state it had in 2026a, except with different comments (column 4)
for some entries to document the new timekeeping in Canada.
Problem reported by Sam James in:
https://lists.iana.org/hyperkitty/list/tz@iana.org/thread/CBEK3HXYBOXGD34ZFDSF64QIDT7ZWGBB/
* zonenow.tab (America/Vancouver): Remove; now coalesced with
America/Phoenix.
(America/Edmonton): Remove; now coalesced with America/Mexico_City.
(America/Winnipeg): Remove; now coalesced with America/Jamaica.
Update comments accordingly.
---
 zonenow.tab | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/zonenow.tab b/zonenow.tab
index bd3a2787..5f1c50dc 100644
--- a/zonenow.tab
+++ b/zonenow.tab
@@ -58,23 +58,17 @@ XX	-2504-13005	Pacific/Pitcairn	Pitcairn
 # -08/-07 - PST/PDT (North America DST)
 XX	+340308-1181434	America/Los_Angeles	Pacific (PST/PDT) - US; Mexico near US border
 #
-# -08/-07 - PST/PDT (North America DST) until 2026-11-01 02:00; then MST
-XX	+4916-12307	America/Vancouver	Mountain Standard (MST) - British Columbia (most areas)
-#
 # -07 - MST
-XX	+332654-1120424	America/Phoenix	Mountain Standard (MST) - Arizona; western Mexico; Yukon
+XX	+332654-1120424	America/Phoenix	Mountain Standard (MST) - western Mexico; Arizona; BC, Yukon
 #
 # -07/-06 - MST/MDT (North America DST)
 XX	+394421-1045903	America/Denver	Mountain (MST/MDT) - US; Mexico near US border; western Nunavut
 #
-# -07/-06 - MST/MDT (North America DST) until 2026-11-01 02:00; then CST
-XX	+5333-11328	America/Edmonton	Central Standard (CST) - Alberta, NWT, and some neighbors
-#
 # -06
 XX	-0054-08936	Pacific/Galapagos	Galápagos
 #
 # -06 - CST
-XX	+1924-09909	America/Mexico_City	Central Standard (CST) - Saskatchewan; central Mexico; Central America
+XX	+1924-09909	America/Mexico_City	Central Standard (CST) - central Mexico; Central America; west central Canada
 #
 # -06/-05 (Chile DST)
 XX	-2709-10926	Pacific/Easter	Easter Island
@@ -82,14 +76,11 @@ XX	-2709-10926	Pacific/Easter	Easter Island
 # -06/-05 - CST/CDT (North America DST)
 XX	+415100-0873900	America/Chicago	Central (CST/CDT) - US; Mexico near US border; central Nunavut
 #
-# -06/-05 - CST/CDT (North America DST) until 2026-11-01 02:00; then EST
-XX	+4953-09709	America/Winnipeg	Eastern Standard (EST) - Manitoba, northwestern Ontario
-#
 # -05
 XX	-1203-07703	America/Lima	eastern South America
 #
 # -05 - EST
-XX	+175805-0764736	America/Jamaica	Eastern Standard (EST) - Caymans; Jamaica; eastern Mexico; Panama
+XX	+175805-0764736	America/Jamaica	Eastern Standard (EST) - Jamaica, Panama, E Mexico, Caymans; Manitoba, NW ON
 #
 # -05/-04 - CST/CDT (Cuba DST)
 XX	+2308-08222	America/Havana	Cuba
