/sys$common/syshlp/HELPLIB.HLB  —  DECdts  utc_mkvmsgmtime, Description
    The Make VMS Greenwich Mean Time routine converts an OpenVMS
    format binary time representing GMT to a binary timestamp with
    the equivalent UTC value. Since the input and output values are
    based on different time standards, any input representing a value
    after A.D. 30,000 returns an error.
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