Enforce a UTC timezone if none is set to prevent misconfigured php from blowing up, refs #923

src/Composer/Console/Application.php

@@ -47,12 +47,16 @@ class Application extends BaseApplication
 
     public function __construct()
     {
-        ErrorHandler::register();
         if (function_exists('ini_set')) {
             ini_set('xdebug.show_exception_trace', false);
             ini_set('xdebug.scream', false);
+
+        }
+        if (function_exists('date_default_timezone_set') && function_exists('date_default_timezone_get')) {
+            date_default_timezone_set(@date_default_timezone_get());
         }
 
+        ErrorHandler::register();
         parent::__construct('Composer', Composer::VERSION);
     }