Just another Ruby porter,
http://jarp.jin.gr.jp/diary/200308b.html#200308111 より．
% ruby -rdate -rpp \
-e 'pp Date._strptime(ARGV[0], "%d/%b/%Y:%T %Z")' \
'11/Aug/2003:22:36:08 +0900'
{:zone=>"+0900",
:sec=>8,
:year=>2003,
:hour=>22,
:offset=>32400,
:mday=>11,
:min=>36,
:mon=>8}
% ruby -rdate -e '
p Time.mktime(*Date._strptime(ARGV[0], "%d/%b/%Y:%T %Z").
values_at(:year, :mon, :mday, :hour, :min, :sec, :zone))' \
'11/Aug/2003:22:36:08 +0900'
Mon Aug 11 22:36:08 JST 2003