Help for this page
$ perl -wMstrict -MDateTime -le 'print DateTime->now(time_zone=>$_)->s +trftime("%Z %z") for qw# America/Havana Asia/Shanghai America/Chicago + #' CST -0500 CST +0800 CST -0600
$ perl -wMstrict -MDateTime -le 'print DateTime->new(year=>$_,time_zon +e=>"Pacific/Apia")->strftime("%Y %z") for qw/ 2010 2012 /' 2010 -1100 2012 +1400