diff --git a/default_conf.py b/default_conf.py
index 18cc103..0d1df53 100644
--- a/default_conf.py
+++ b/default_conf.py
@@ -23,8 +23,7 @@ log_format = '$server_name:$server_port $remote_addr - $remote_user [$time_local
     '"$http_referer" "$http_user_agent"'
 
 # Time format used in log format
-# TOFIX UTC
-time_format = '%d/%b/%Y:%H:%M:%S +0100'
+time_format = '%d/%b/%Y:%H:%M:%S %z'
 
 # Hooks that are loaded at runtime (only set names without path and extensions)
 pre_analysis_hooks = []
diff --git a/iwla.py b/iwla.py
index d24dacc..44ea4b4 100755
--- a/iwla.py
+++ b/iwla.py
@@ -310,7 +310,22 @@ class IWLA(object):
         return True
 
     def _decodeTime(self, hit):
-        hit['time_decoded'] = time.strptime(hit['time_local'], conf.time_format)
+        try:
+            hit['time_decoded'] = time.strptime(hit['time_local'], conf.time_format)
+        except ValueError, e:
+            if sys.version_info < (3, 2):
+            # Try without UTC value at the end (%z not recognized)
+                gmt_offset_str = hit['time_local'][-5:]
+                gmt_offset_hours = int(gmt_offset_str[1:3])*60*60
+                gmt_offset_minutes = int(gmt_offset_str[3:5])*60
+                gmt_offset = gmt_offset_hours + gmt_offset_minutes
+                hit['time_decoded'] = time.strptime(hit['time_local'][:-6], conf.time_format[:-3])
+                if gmt_offset_str[0] == '+':
+                    hit['time_decoded'] = time.localtime(time.mktime(hit['time_decoded'])+gmt_offset)
+                else:
+                    hit['time_decoded'] = time.localtime(time.mktime(hit['time_decoded'])-gmt_offset)
+            else:
+                raise e
         return hit['time_decoded']
 
     def getDisplayIndex(self):
@@ -583,7 +598,7 @@ class IWLA(object):
         print '==> Load previous database'
 
         self.meta_infos = self._deserialize(conf.META_PATH) or self._clearMeta()
-        if 'last_time' in self.meta_infos.keys():
+        if self.meta_infos['last_time']:
             self.current_analysis = self._deserialize(self.getDBFilename(self.meta_infos['last_time'])) or self._clearVisits()
         else:
             self._clearVisits()