ZDUMP(8) BSD System Manager's Manual ZDUMP(8)NAMEzdump — time zone dumper
SYNOPSISzdump [--version] [-v] [-c [loyear,]highyear] [zonename ...]
DESCRIPTIONzdump 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.
LIMITATIONS
The -v option may not be used on systems with floating-point time_t val‐
ues that are neither float nor double.
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.
SEE ALSOctime(3), tzfile(5), zic(8)BSD October 29, 2003 BSD
