# File lib/nanoc3/helpers/blogging.rb, line 295
    def atom_tag_for(item)
      require 'time'

      hostname, base_dir = %r{^.+?://([^/]+)(.*)$}.match(@site.config[:base_url])[1..2]

      time = item[:created_at]
      formatted_date = (time.is_a?(String) ? Time.parse(time) : time).to_iso8601_date

      'tag:' + hostname + ',' + formatted_date + ':' + base_dir + (item.path || item.identifier)
    end