Index: wp-includes/functions.php
===================================================================
--- wp-includes/functions.php	(revision 11201)
+++ wp-includes/functions.php	(working copy)
@@ -77,9 +77,11 @@
  * will be used instead.
  *
  * @since 0.71
+ * 
+ * @see http://php.net/manual/en/function.date.php for $dateformatstring Format
  *
  * @param string $dateformatstring Format to display the date.
- * @param int $unixtimestamp Optional. Unix timestamp.
+ * @param int $unixtimestamp Optional. Unix timestamp (UTC).
  * @param bool $gmt Optional, default is false. Whether to convert to GMT for time.
  * @return string The date, translated if locale specifies it.
  */