Archives for specific tags or metadata

I'd like to generate archives for a specific tag (i.e. memories for which archives would be perfect because of calendaring).

Since {{#tagged.memories}} only seems to work inside {{entries}} in the example below (it generates empty headers for months without tagged entries), is there another way to tweak this to make it so? Or at least hide the empty months, years, etc. that show up?

Thanks! Ray

{{#archives}}
  <h2>{{year}}</h2>
  {{#months}}
    <h3>{{month}}</h3>
    {{#entries}}
    <a href="{{url}}">{{title}}</a>
    {{/entries}}
  {{/months}}