From 129130b0f7b7a10d8c2178842792193251be8c4e Mon Sep 17 00:00:00 2001
From: friendica <info@friendica.com>
Date: Sun, 8 Apr 2012 18:01:49 -0700
Subject: [PATCH] fix empty string timezone

---
 include/datetime.php | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/datetime.php b/include/datetime.php
index 6d395fe3f2..1c43813d3d 100644
--- a/include/datetime.php
+++ b/include/datetime.php
@@ -80,6 +80,13 @@ function field_timezone($name='timezone', $label='', $current = 'America/Los_Ang
 if(! function_exists('datetime_convert')) {
 function datetime_convert($from = 'UTC', $to = 'UTC', $s = 'now', $fmt = "Y-m-d H:i:s") {
 
+	// Defaults to UTC if nothing is set, but not if set to empty string.
+
+	if($from == '')
+		$from = 'UTC';
+	if($to == '')
+		$to = 'UTC';
+
 	// Slight hackish adjustment so that 'zero' datetime actually returns what is intended
 	// otherwise we end up with -0001-11-30 ...
 	// add 32 days so that we at least get year 00, and then hack around the fact that