[Resolved] Formatting MySQL's DATETIME plus or minus a COOKIE value

[solitario]

Hello all.
I have a DATETIME field in a MySQL database, called date_entered, into which I am inserting Greenwich Mean times via PHP like so:

gmdate("YmdHis")

The dates in the database look something like this:

2005-08-02 00:01:01

When I retrieve the database column, the PHP code looks like this:

echo $row->date_entered;

I also have a COOKIE called $_COOKIE['time_zone'] which stores values such as: -5 (for Eastern Standard Time), +1 (for Madrid), +2 (for Athens), etc. (I set Greenwich to 0, btw.)

Now, how would I add the value of $_COOKIE['time_zone'] to the result of the database column, then format it into, say:
Aug 02, 2005

Many thanks to anyone who can help me with this.