As a preference to setting the date and time manually for a device, you can select a site time server. A site time server sets the date and time in the Site Director. Site time servers can be on your intranet, such as a Domain Controller/Server; or on the Internet, such as the U.S. Naval Observatory Master Clock.
For a list of Internet time servers, go to https://tf.nist.gov/tf-cgi/servers.cgi.