From 83732349a7c077767b5ae6c38faec473cb6442d1 Mon Sep 17 00:00:00 2001
From: Helmut Merz <helmutm@cy55.de>
Date: Mon, 11 Mar 2013 11:43:12 +0100
Subject: [PATCH] provide localization of datetime values if pytz module is
 present: error handling

---
 util/date.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/util/date.py b/util/date.py
index fa8ca31..b73a00a 100644
--- a/util/date.py
+++ b/util/date.py
@@ -72,7 +72,10 @@ def year(d=None):
 
 
 def toLocalTime(d):
-    if pytz is None:
+    if pytz is None or not d:
         return d
     cet = pytz.timezone('CET')
-    return d.astimezone(cet)
+    try:
+        return d.astimezone(cet)
+    except ValueError:
+        return d