my-site/layouts/partials/article.html

{{ $page := .Page }}
<article class="single" itemscope itemtype="http://schema.org/BlogPosting">
  <div class="meta">
{{ if not .Page.Date.IsZero }}
    <span class="key">published on</span>
    <span class="val"><time itemprop="datePublished" datetime="{{ .Date.Format "2006-01-02" }}">{{ .Date.Format "January 02, 2006" }}</time></span>
{{ end }}
{{ with .Params.categories }}
    <span class="key">{{ if $page.Date.IsZero }}published {{ end }}in</span>
    <span class="val">
{{ range . }}
        <a href="{{ . | printf "categories/%s" | relURL }}">{{ . }}</a>
{{ end }}
    </span>
{{ end }}
{{ with .Params.tags }}
    <br>
    <span class="key">tags:</span>
    <span class="val">
{{ range . }}
        <a href="{{ . | printf "tags/%s" | relURL }}">{{ . }}</a>
{{ end }}
    </span>
{{ end }}
  </div>
  <h1 class="headline" itemprop="headline">{{ .Title }}</h1>
  <section class="body" itemprop="articleBody">
    {{ .Content }}
  </section>
</article>