prints the current time in each
named on the command line.
These options are available:
- Cut off verbose output near the start of the given year(s).
By default, the program cuts off verbose output near the start of the
years -500 and 2500.
- 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”
option may not be used on systems with
values that are neither float
Time discontinuities are found by sampling the results returned by localtime at
twelve-hour intervals. This works in all real-world cases;