Time and date settings are synchronized with the settings that you configure in the Hydrawise app. The timezone is set based on the location you entered during the app wizard.
If your controller is running as a stand-alone controller (WiFi is disabled) then the date, time, and time zone will be shown on a GREEN background and can be updated.
IMPORTANT: If a Hydrawise controller never had an internet connection, the default time is set in a 24-hour format when running in offline mode.