Adding Drupal field "subtitle" to page template I have created a Content Type called "Happy Days". I have created a field in that called "subtitle". 

In my template "page--happy-days.tpl.php", I want the field "subtitle" to show wrapped in an  tag. I attempted:

&lt;h2&gt;&lt;?php print render($content['field_subtitle']); ?&gt;&lt;/h2&gt;


but no luck. Any help would be appreciated.
I assume you cleared the cache. Your issue is page--content-type.tpl.php override not working. Try to suggest theme hook in THEME_preprocess_node.

Furthermore you need to theme nodes of Happy Day content type, so you must use node--CONTENT_TYPE.tpl.php. For more information visit Theming nodes by content type page.