ZDUMP(8)                NetBSD System Manager's Manual                ZDUMP(8)

NAME
     zdump -- time zone dumper

SYNOPSIS
     zdump [--version] [-v] [-V] [-c [loyear,]highyear] [zonename ...]
     zdump -t [loyear,]highyear [zonename ...]

DESCRIPTION
     zdump prints the current time in each zonename named on the command line.

     These options are available:
     --version  Output version information and exit.
     -v         For each zonename on the command line, print the time at the
                lowest possible time value, the time one day after the lowest
                possible time value, the times both one second before and
                exactly at each detected time discontinuity, the time at one
                day less than the highest possible time value, and the time at
                the highest possible time value, Each line ends with
                      isdst=1
                if the given time is Daylight Saving Time or
                      isdst=0
                otherwise.
     -c [loyear,]highyear
                Cut off the verbose output near the start of the given
                year(s).  By default, the program cuts off verbose output near
                the starts of the years -500 and 2500.
     -t [loyear,]highyear
                Cut off verbose output at the start of the given time(s),
                given in decimal seconds since 1970-01-01 00:00:00 UTC.
     -V         Like -v, except omit the times relative to the extreme time
                values.  This generates output that is easier to compare to
                that of implementations with different time representations.

LIMITATIONS
     Time discontinuities are found by sampling the results returned by local-
     time at twelve-hour intervals.  This works in all real-world cases; one
     can construct artificial time zones for which this fails.

     In the output, ``UT'' denotes the value returned by gmtime(3), which uses
     UTC for modern time stamps and some other UT flavor for time stamps that
     predate the introduction of UTC.  No attempt is currently made to have
     the output use ``UTC'' for newer and ``UT'' for older time stamps, partly
     because the exact date of the introduction of UTC is problematic.

SEE ALSO
     ctime(3), tzfile(5), zic(8)

NetBSD 6.0                    September 20, 2013                    NetBSD 6.0

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