diff --git a/dockerplugin.py b/dockerplugin.py
index c725b2e..7cf3b83 100755
--- a/dockerplugin.py
+++ b/dockerplugin.py
@@ -25,6 +25,7 @@
 
 import dateutil.parser
 from distutils.version import StrictVersion
+import calendar
 import docker
 import os
 import threading
@@ -58,7 +59,7 @@ def emit(cls, container, type, value, t=None, type_instance=None):
             val.type_instance = type_instance
 
         if t:
-            val.time = time.mktime(dateutil.parser.parse(t).timetuple())
+            val.time = calendar.timegm(dateutil.parser.parse(t).utctimetuple())
         else:
             val.time = time.time()