FULL PRODUCT VERSION :
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux 3.13.0-45-generic #74-Ubuntu SMP Tue Jan 13 19:36:28 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
Java reports CST for America/Cancun after updating time zone information to tzdata2015a.

The following information in http://www.iana.org/time-zones/repository/releases/tzdata2015a.tar.gz shows that America/Cancun should be in Eastern Standard Time (EST) after Feb 1 2015.

Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
-6:00 - CST 1981 Dec 23
-5:00 Mexico E%sT 1998 Aug 2 2:00
-6:00 Mexico C%sT 2015 Feb 1 2:00
-5:00 - EST

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Make sure java uses tzdata2015a
# java -jar tzupdater.jar -V
tzupdater version 1.4.11-b01
JRE time zone data version: tzdata2015a
Embedded time zone data version: tzdata2015a

Run this:

import java.util.TimeZone;
public class TimeZoneTest {
public static void main(final String[] args) {
TimeZone cancun = TimeZone.getTimeZone("America/Cancun");
System.out.println(cancun.getDisplayName(false, TimeZone.LONG));
System.out.println(cancun.getDisplayName(false, TimeZone.SHORT));
}
}


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Eastern Standard Time
EST
ACTUAL -
Central Standard Time
CST


REPRODUCIBILITY :
This bug can be reproduced always.