I think I’ve narrowed it down even further.
I think it’s the nethserver subscription daemon.
http://docs.nethserver.org/projects/nethserver-devel/en/v7/nethserver-subscription.html
NethServer Monitor Services (NMS)
NMS is a python daemon which monitor the status of all services registered inside the configuration db. Each service is checked every 300 seconds, if the status of a service changes, NMS writes a notification to Collectd socket.
then here:
line 33 refers to
/usr/libexec/nethserver/read-service-status
running this script from the command prompt causes the freedesktop.timedate messages to appear in the log.
I’m not quite sure what to do next though…