If you just want to display it in a readable format I normally just use the following once I have ran the query
$query = "SELECT * FROM cms_news WHERE news_id = '$news_id'";
$getnews = mysql_query($query) or die(mysql_error());
$currnews = mysql_fetch_array($getnews);
$postdate = $currnews[news_postdate];
$year = substr($postdate, 0, 4);
$month = substr($postdate, 4, 2);
$day = substr($postdate, 6, 2);
$newsdate = date('M d, Y', mktime(0, 0, 0, $month, $day, $year));
echo $newsdate; // this will dispay as Feb 10, 2005
there are a few other tweaks you can use to get the time. Hope this is what you are looking for.