Input
 utc
    Binary timestamp or relative binary timestamp.
    Output
 utclp
    Lowest (earliest) possible time that the input binary timestamp
    or shortest possible relative time that the relative binary
    timestamp can represent.
 utcmp
    Midpoint of the input binary timestamp or the midpoint of the
    input relative binary timestamp.
 utchp
    Highest (latest) possible time that the input binary timestamp
    or the longest possible relative time that the relative binary
    timestamp can represent.