1.\" $NetBSD: zdump.8,v 1.9 2012/08/09 12:38:26 christos Exp $ 2.Dd October 29, 2003 3.Dt ZDUMP 8 4.Os 5.Sh NAME 6.Nm zdump 7.Nd time zone dumper 8.Sh SYNOPSIS 9.Nm zdump 10.Op Fl \-version 11.Op Fl v 12.Op Fl c Ar [loyear,]highyear 13.Op Ar zonename ... 14.Sh DESCRIPTION 15.Nm 16prints the current time in each 17.Ar zonename 18named on the command line. 19.Pp 20These options are available: 21.Bl -tag -width XXXXXXXXX -compact 22.It Fl \-version 23Output version information and exit. 24.It Fl v 25For each 26.Ar zonename 27on the command line, 28print the time at the lowest possible time value, 29the time one day after the lowest possible time value, 30the times both one second before and exactly at 31each detected time discontinuity, 32the time at one day less than the highest possible time value, 33and the time at the highest possible time value, 34Each line ends with 35.Dl isdst=1 36if the given time is Daylight Saving Time or 37.Dl isdst=0 38otherwise. 39.It Fl c Ar [loyear,]highyear 40Cut off the verbose output near the start of the given year(s). 41By default, 42the program cuts off verbose output near the starts of the years -500 and 2500. 43.El 44.Sh LIMITATIONS 45The 46.Fl v 47option may not be used on systems with floating-point time_t values 48that are neither float nor double. 49.Pp 50Time discontinuities are found by sampling the results returned by localtime 51at twelve-hour intervals. 52This works in all real-world cases; 53one can construct artificial time zones for which this fails. 54.Sh SEE ALSO 55.Xr ctime 3 , 56.Xr tzfile 5 , 57.Xr zic 8 58.\" @(#)zdump.8 8.2 59.\" This file is in the public domain, so clarified as of 60.\" 2009-05-17 by Arthur David Olson. 61