Submission Sep 14-16, 2012: Sapporo RubyKaigi 2012 Nov 1-3, 2012: RubyConf 2012 Nov 8-9, 2012: RubyWorld Conference 2012 Jan 13-14, 2013: Tokyo RubyKaigi 10 Feb 23, 2013: Ruby 2.0 Release && Ruby 20th Anniversary Mar 16, 2013: Oedo RubyKaigi 03 May 30 - Jun 1, 2013: The RubyKaigi 2013