[tz] Cuba changing clocks this Sunday

[Paul Eggert]

Thanks for the heads-up.  Here's a proposed patch to the
tz database.  Looks like we'll have to push out a new version
ASAP.

>From 0ff4ee1dd4b2b9042052df4a4acab3c72f3d2665 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert at cs.ucla.edu>
Date: Sat, 3 Nov 2012 01:45:16 -0700
Subject: [PATCH] Cuba switches to standard time on November 4 this year.

* northamerica: Alter Cuba rules accordingly.
Thanks to Steffen Thorsen for the heads-up, in
<http://mm.icann.org/pipermail/tz/2012-November/018427.html>.
---
 northamerica |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/northamerica b/northamerica
index 1f784e0..18a4228 100644
--- a/northamerica
+++ b/northamerica
@@ -2797,6 +2797,13 @@ Zone America/Costa_Rica	-5:36:20 -	LMT	1890		# San Jose
 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
 # </a>
 
+# From Steffen Thorsen (2012-11-03):
+# Radio Reloj and many other sources report that Cuba is changing back
+# to standard time on 2012-11-04:
+# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
+# From Paul Eggert (2012-11-03):
+# For now, assume the future rule is first Sunday in November.
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
 Rule	Cuba	1928	only	-	Oct	10	0:00	0	S
@@ -2834,7 +2841,7 @@ Rule	Cuba	2009	2010	-	Mar	Sun>=8	0:00s	1:00	D
 Rule	Cuba	2011	only	-	Mar	Sun>=15	0:00s	1:00	D
 Rule	Cuba	2011	only	-	Nov	13	0:00s	0	S
 Rule	Cuba	2012	only	-	Apr	1	0:00s	1:00	D
-Rule	Cuba	2012	max	-	Oct	lastSun	0:00s	0	S
+Rule	Cuba	2012	max	-	Nov	Sun>=1	0:00s	0	S
 Rule	Cuba	2013	max	-	Mar	Sun>=8	0:00s	1:00	D
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-- 
1.7.9.5