diff --git a/tools/build/build.py b/tools/build/build.py
index dd025173..79965272 100755
--- a/tools/build/build.py
+++ b/tools/build/build.py
@@ -2,7 +2,6 @@
 #vim: et:ts=4:sw=4:sts=4
 
 import base64
-import datetime
 import json
 import os
 import ox
@@ -195,7 +194,7 @@ def build_oxjs(downloads=False, geo=False):
     # downloads
     if downloads:
         data = {
-            'date': datetime.datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%SZ'),
+            'date': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime()),
             'size': {'minified': os.path.getsize(build_path + 'Ox.js')},
             'version': version
         }