def expand_event_list(itemId, defaultTitle = nil, skipIfDatePresent = false)
  if @items[itemId][:events].instance_of? Nanoc::ItemArray
    @items[itemId][:events].each_with_index do |event,n|
      if (!skipIfDatePresent || !@items.any?{ |i| conv_tz(i[:startdate])==conv_tz(event[:startdate]) })
        metadata = {
          :title => defaultTitle,
          :public => true
        }
        metadata.merge!(event)
        metadata[:kind]='event'
        @items << Nanoc::Item.new("<%= render 'event_body' %>", metadata, "#{itemId}#{n}/")
      end
    end
  end
end