Merge pull request laravel#2960 from josezenem/master

Missing validation sentence for timezone.

Author: taylorotwell

app/lang/en/validation.php

@@ -71,6 +71,7 @@
 	),
 	"unique"               => "The :attribute has already been taken.",
 	"url"                  => "The :attribute format is invalid.",
+	"timezone"             => "The :attribute must be a valid zone.",
 
 	/*
 	|--------------------------------------------------------------------------