Question : Converting GMT to EST

Experts, I'm pulling an XML feed that has a field called "date_time" with dates in this format:
2010-09-05 19:30:00
2010-09-06 20:00:00
2010-09-07 00:00:00

To translate $date_time for my users, I've parsed this data as follows:

$shortdate = substr($date_time,0,10);  //  Appears as 2010-09-02 23:30
$year = substr($date_time,0,4);  //  Appears as 2010
$day = substr($date_time,8,2);   //  Appears as 02
$weekday = date("l", mktime(0,0,0,$month,$day,$year));   //  Appears as Thursday
$gametime = substr($date_time,11,5);  //  Appears as 23:30

My users are in the USA Eastern Time Zone.
date_default_timezone_set('America/New_York');

I am mainly interested in the Day of the Week and the time.
When I run my parsing on this:
2010-09-07 00:00:00
I get:  Tuesday, 00:00.

Unfortunately, in New York (EST)
This will confuse my users because the game is really:
Monday, 8:00 PM

What is the best way to turn "2010-09-07 00:00:00" into "Monday, 8:00 PM"?

Thanks in advance!

-Dan

Answer : Converting GMT to EST

Here You go --

1: 2: 3:

<? echo date("D, h:i A",strtotime("2010-09-07 00:00:00") -3600 *4 ) ; ?>