--- utc_offset
--- gmt_offset
--- gmtoff

    ruby 1.7 feature

    Ȥλäñ̤ȤͤȤ֤ޤ

    ʤǤ(ȥꥢʤ)
    ˤ͡٤Ƥ(ꥫʤ)ˤͤˤʤޤ

      p Time::now.zone  # => "JST"
      p Time::now.utc_offset
      # => 32400

    ॾ󤬶ꤵƤ 0 ֤ޤ

      p Time::now.zone  # => "JST"
      p Time::now.getgm.utc_offset
      # => 0

