ActiveSupport、Date#to_date
>> require "rubygems" => true >> require "active_support" => true >> Date.new(2008,12,31).to_date => Wed, 31 Dec 2008 >> Date.new(2008,12,31).to_date.class => Date
>> require "rubygems" => true >> require "active_support" => true >> Date.new(2008,12,31).to_date => Wed, 31 Dec 2008 >> Date.new(2008,12,31).to_date.class => Date