$ perl -e '($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) = localtime(1234567890); printf("%04d/%02d/%02d %02d:%02d:%02d\n", $year + 1900, $mon + 1, $mday, $hour, $min,$sec);' 2009/02/14 08:31:30 なるほど、localtime(12345678…