From a5bb301d0b325a94ada49b320043ba07a3157a33 Mon Sep 17 00:00:00 2001
From: Dion Hulse <dd32@git.wordpress.org>
Date: Fri, 16 Dec 2016 06:41:45 +0000
Subject: [PATCH] Feeds: Replace the RSS2 `lastBuildDate` date field with the
 `r` date specifier.

See #39141.


git-svn-id: https://develop.svn.wordpress.org/trunk@39614 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/feed-rss2.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/wp-includes/feed-rss2.php b/src/wp-includes/feed-rss2.php
index fa58e2440a..2e53b1701b 100644
--- a/src/wp-includes/feed-rss2.php
+++ b/src/wp-includes/feed-rss2.php
@@ -44,7 +44,7 @@ do_action( 'rss_tag_pre', 'rss2' );
 	<description><?php bloginfo_rss("description") ?></description>
 	<lastBuildDate><?php
 		$date = get_lastpostmodified( 'GMT' );
-		echo $date ? mysql2date( 'D, d M Y H:i:s +0000', $date, false ) : date( 'D, d M Y H:i:s +0000' );
+		echo $date ? mysql2date( 'r', $date, false ) : date( 'r' );
 	?></lastBuildDate>
 	<language><?php bloginfo_rss( 'language' ); ?></language>
 	<sy:updatePeriod><?php