diff --git a/pyerrors/input/json.py b/pyerrors/input/json.py
index 2e960c3b..4bd7031b 100644
--- a/pyerrors/input/json.py
+++ b/pyerrors/input/json.py
@@ -131,7 +131,7 @@ def create_json_string(ol, description='', indent=1):
     d['program'] = 'pyerrors %s' % (pyerrorsversion.__version__)
     d['version'] = '0.1'
     d['who'] = getpass.getuser()
-    d['date'] = datetime.datetime.now().astimezone().strftime('%Y-%m-%d %H:%M:%S %Z')
+    d['date'] = datetime.datetime.now().astimezone().strftime('%Y-%m-%d %H:%M:%S %z')
     d['host'] = socket.gethostname() + ', ' + platform.platform()
 
     if description: