Updating timezones

Worked out how to to change the timezones and format to what I want using the following code:

// changes the timezone to GMT
date_default_timezone_set('Europe/London'); 


//loads rss feed variable of the image, concatination used to add a counter e.g. 1,2,3... to each photo so that they can be individually edited - using css ID, however had to apply ID to the image source not ID for css styles to work
// also loads the description under each picture to explain what they the picuture shows. 
    // changes the pubDate timezone from the rss feed when it is parsed
	$ipubDate = $photoitem->pubDate;
	$ipubDate = strftime("%Y-%m-%d %H:%M:%S", strtotime($ipubDate));
	print "
 $ipubDate
";
	print "\n";
	print "\n";
//breaks the photo feed if it reaches the selected number
    if($photocounter==19){
	     break;