/sys$common/syshlp/helplib.hlb
Sys Files, [SYSEXE], SYS$READ_TIME_ZONE_RULE.EXE
 *Conan The Librarian 

    Image file that ensures the timezone rule is accurate for the
    current year.  This image uses the timezone file specified in
    the value of the SYS$LOCALTIME logical to define the
    SYS$TIMEZONE_RULE logical.
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