diff --git a/contrib/rss_comments/main.php b/contrib/rss_comments/main.php
index 6ef68a39..52fbead3 100644
--- a/contrib/rss_comments/main.php
+++ b/contrib/rss_comments/main.php
@@ -50,7 +50,7 @@ class RSS_Comments implements Extension {
 			$comment_id = $comment['comment_id'];
 			$link = make_link("post/view/$image_id");
 			$owner = html_escape($comment['user_name']);
-			$posted = strftime("%a, %d %b %Y %T %Z", $comment['posted_timestamp']);
+			$posted = date(DATE_RSS, $comment['posted_timestamp']);
 			$comment = html_escape($comment['comment']);
 			$content = html_escape("$owner: $comment");
 
diff --git a/contrib/rss_images/main.php b/contrib/rss_images/main.php
index 6eae945b..69229740 100644
--- a/contrib/rss_images/main.php
+++ b/contrib/rss_images/main.php
@@ -64,7 +64,7 @@ class RSS_Images implements Extension {
 			$owner = $image->get_owner();
 			$thumb_url = $image->get_thumb_link();
 			$image_url = $image->get_image_link();
-			$posted = strftime("%a, %d %b %Y %T %Z", $image->posted_timestamp);
+			$posted = date(DATE_RSS, $image->posted_timestamp);
 			$content = html_escape(
 				"<p>" . Themelet::build_thumb_html($image) . "</p>" .
 				"<p>Uploaded by " . $owner->name . "</p>"