raise "#{self.inspect} #{from_datetime.inspect}"

--

#<Holiday:0xb790b608 @attributes={"updated_at"=>"2006-11-29 23:17:14", "available"=>nil, "deleted_at"=>nil, "id"=>"2", "until_datetime"=>"0012-12-12 10:00:00", "schedule_id"=>"1", "from_datetime"=>"1111-11-11 00:00:00", "created_at"=>"2006-11-29 23:17:14", "agent_id"=>"1"}> nil