Input

 tzlen

    Length of buffer tzname.

 utc

    Binary timestamp. This parameter is ignored.

    Output

 tzname

    Character string long enough to hold the time zone label.

 tdf

    Longword with differential in seconds east or west of GMT. A
    value of zero is always returned.

 isdst

    Integer with a value of zero, indicating that daylight saving
    time is not in effect. A value of zero is always returned.