PASSED Manual Testing using the following steps:

1. Start liferay, go to control panel, click my account.
2. Change the users time zone to (UTC-05:00) Eastern Standard Time.
3. Back to liferay, add a calendar portlet. Following Angeol's test cases.
The first set of tests, test TZSRecurrence with a complete timezone component and a timezone that does not have a daylight savings time component.
The second set of tests, test an event that has a start date in January, repeats on the first Sunday of every month, and the 2nd day of every month.
The third set of tests, test an even that has a start date in July and repeats on the first Sunday of every month, and the 6th day of every month.

Reproduced on:
Tomcat 7.0 + MySQL 5. 6.0.11 EE.

If I test with a timezone that does not have a daylight savings time component, there is no error, everything works fine, if I test
with a complete timezone component (Eastern Standard Time), when I have a start date in January (outside of DST), it also works fine,
if I repeats on the first Sunday of every month, I will see each sunday is marked. While if I have a start date in July (within DST),
when I repeat on the first Sunday of every month, I will see each monday is marked, if I repeat the 6th day of every month, I will see
the 7th day is marked, they are displayed one day after schedule date.

Fixed on:
Tomcat 7.0 + MySQL 5. 6.0.x GIT ID: 03ff7cc646ee5ac7be3628509b94ac27acee91c1.
Tomcat 7.0 + MySQL 5. 6.1.x GIT ID: 022ab7a0ba93a04eccc58246985dce4db1ffc45a.
Tomcat 7.0 + MySQL 5. 6.2.x GIT ID: b0bdd113ad31cc421771b35ecb810e6e5b763fde.

I test TZSRecurrence with a complete timezone component and a timezone that does not have a daylight savings time component, they all work fine.
The date is correct.

Committed on:
6.0.x GIT ID: d3dc82712f0da293aa7255bd404d60414d34cdea.
6.1.x GIT ID: 8b7451c195d932163a2440f50fc1704f2ee7274d.
6.2.x GIT ID: 8b7451c195d932163a2440f50fc1704f2ee7274d.