Timezones and Time-related Logical Names?
Various logical names are used to manage time and timezones, and you should avoid direct modification of these logical names as the implementations are subtle and quick to change. As discussed in section Section 4.3.3, you will want to use the following command procedure to maintain the time and the timezone: o SYS$MANAGER:UTC$TIME_SETUP.COM 4-18 Time and Timekeeping If you want to venture into uncharted territories and modify the TDF used within older releases of TCP/IP Services-within releases prior V5.0-you can attempt to use the following undocumented commands: SET TIME/DIFF=[positive or negative TDF integer] GENERATE TIME to reset the value of the logical name UCX$TDF. Prior to OpenVMS V7.3, the command: $ SETTZ :== $SYS$SYSTEMTSS$SET_TIMEZONE $ SETTZ MODIFY can be used to modify the settings of the SYS$TIMEZONE_ DAYLIGHT_SAVING, SYS$TIMEZONE_DIFFERENTIAL, and SYS$TIMEZONE_NAME system logical names based on the SYS$TIMEZONE_RULE. The following are other TDF-related logical names u
