The zdump(1) utility prints the current time in each
zonename named on the command line.
These options are available:
-ccutoffyear
Cut off the verbose output near the start of the given
year.
-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.