VMS Help Sys Parameters, AUTO_DLIGHT_SAV  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    AUTO_DLIGHT_SAV is set to either 1 or 0. The default is 0.

    If AUTO_DLIGHT_SAV is set to 1, OpenVMS automatically makes the
    change to and from daylight saving time.