Index: wp-includes/functions.php
===================================================================
--- wp-includes/functions.php	(revision 12258)
+++ wp-includes/functions.php	(working copy)
@@ -81,9 +81,10 @@
  * @param string $dateformatstring Format to display the date.
  * @param int $unixtimestamp Optional. Unix timestamp.
  * @param bool $gmt Optional, default is false. Whether to convert to GMT for time.
+ * @param string $context Optional, the date's context for languages with untypical grammars
  * @return string The date, translated if locale specifies it.
  */
-function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
+function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false, $context = '' ) {
 	global $wp_locale;
 	$i = $unixtimestamp;
 	// Sanity check for PHP 5.1.0-
@@ -122,7 +123,7 @@
 	}
 	$j = @$datefunc( $dateformatstring, $i );
 	// allow plugins to redo this entirely for languages with untypical grammars
-	$j = apply_filters('date_i18n', $j, $req_format, $i, $gmt);
+	$j = apply_filters('date_i18n', $j, $req_format, $i, $gmt, $context);
 	return $j;
 }