The dates and times that you see displayed in the user interface represent the local time zone of your browser. This can be different from the time zone of the appliance where ExtremeCloud IQ Controller is installed.
For example, if ExtremeCloud IQ Controller is installed on an appliance in EDT time zone, and your browser is installed on a machine in PDT time zone, the time represented in the detail views and logs will be in PDT, the time zone of the browser.
In this scenario, if you register a client with ExtremeCloud IQ Controller at 8:30 EDT, the Event Logs and Client Detail values show the time as 5:30.