The following IETF I-D is currently in its working group last call. draft-ietf-dhc-dhcpv6-opt-timeconfig-01.txt Since it is concerned with timezone configuration (as well as NTP server config, which would be of less interest probably) people here may want to review it. The mailing list for comments is dhcwg@ietf.org See https://www1.ietf.org/mailman/listinfo/dhcwg for mailing list info. kre