This read-write integer enables or disables automatic daylight saving time adjustment on the Ps1 controller, toggled off(0) or on(1). An admin sets this according to whether the site's local time zone observes daylight saving, so the controller's clock and timestamps stay accurate through the year. For example, an admin at a site in a region that does not observe daylight saving would set this to off(0) to prevent the controller from shifting its clock unnecessarily.