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-.\"
-.\" @(#)zdump.8 8.2
-.\" This file is in the public domain, so clarified as of
-.\" 2009-05-17 by Arthur David Olson.
-.\" $FreeBSD$
-.\"
-.Dd June 20, 2004
-.Dt ZDUMP 8
-.Os
-.Sh NAME
-.Nm zdump
-.Nd timezone dumper
-.Sh SYNOPSIS
-.Nm
-.Op Fl -version
-.Op Fl v
-.Op Fl c Ar [loyear,]hiyear
-.Op Ar zonename ...
-.Sh DESCRIPTION
-The
-.Nm
-utility prints the current time in each
-.Ar zonename
-named on the command line.
-.Pp
-The following options are available:
-.Bl -tag -width indent
-.It Fl -version
-Output version information and exit.
-.It Fl v
-For each
-.Ar 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
-.Em isdst=1
-if the given time is Daylight Saving Time or
-.Em isdst=0
-otherwise.
-.It Fl c Ar loyear,hiyear
-Cut off 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.
-.El
-.Sh LIMITATIONS
-The
-.Fl v
-option may not be used on systems with floating-point time_t values
-that are neither float nor double.
-.Pp
-Time discontinuities are found by sampling the results returned by localtime
-at twelve-hour intervals.
-This works in all real-world cases;
-one can construct artificial time zones for which this fails.
-.Sh "SEE ALSO"
-.Xr ctime 3 ,
-.Xr tzfile 5 ,
-.Xr zic 8
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