From 9860f6a01342c00be381d4a25526c20a02903b87 Mon Sep 17 00:00:00 2001
From: Andrew McMillan <andrew@morphoss.com>
Date: Wed, 5 Oct 2011 11:45:52 +0200
Subject: [PATCH] Expand also has a dtstamp that needs to be set correctly.

---
 inc/tz/expand.php | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/inc/tz/expand.php b/inc/tz/expand.php
index 329ac68d..9fe0edbf 100644
--- a/inc/tz/expand.php
+++ b/inc/tz/expand.php
@@ -163,7 +163,14 @@ $vtz = new vCalendar($tz->vtimezone);
 
 $response = new XMLDocument(array("urn:ietf:params:xml:ns:timezone-service" => ""));
 $timezones = $response->NewXMLElement('urn:ietf:params:xml:ns:timezone-service:timezones');
-$timezones->NewElement('dtstamp', gmdate('Y-m-d\TH:i:s\Z'));
+$qry = new AwlQuery('SELECT to_char(max(last_modified),\'YYYY-MM-DD\"T\"HH24:MI:SS"Z"\') AS dtstamp FROM timezones');
+if ( $qry->Exec('tz/list',__LINE__,__FILE__) && $qry->rows() > 0 ) {
+  $row = $qry->Fetch();
+  $timezones->NewElement('dtstamp', $row->dtstamp);
+}
+else {
+  $timezones->NewElement('dtstamp', gmdate('Y-m-d\TH:i:s\Z'));
+}
 
 $from = new RepeatRuleDateTime($start);
 $until = new RepeatRuleDateTime($end);