zdump \- time zone dumper
cutoffyear ] [ zonename ... ]
prints the current time in each
named on the command line.
These options are available:
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 time at which the rules for computing local time change,
the time at the highest possible time value,
and the time at one day less than the highest possible time value.
if the given time is Daylight Saving Time or
Cut off the verbose output near the start of the given year.
/etc/zoneinfo standard zone information directory
newctime(3), tzfile(5), zic(8)