hugo-theme-hilfe/layouts/posts/single.html

{{ define "main" }}
    {{ $dateFormat := default "January 2, 2006" .Site.Params.GeekdocDateFormat }}
    <article class="gdoc-markdown gdoc-post">
      <header>
        <h1 class="gdoc-post__title">{{ .Title }}</h1>
        <div class="gdoc-post__date">{{ .Date.Format $dateFormat }}</div>
      </header>
      <div>
        {{ partial "content" . }}
      </div>
    </article>
{{ end }}