weiro/layouts/simplecss/posts_single.html

{{ if .Post.Title }}<h3>{{ .Post.Title }}</h3>{{ end }}
{{ .HTML }}
<a href="{{ url_abs .Path }}">{{ format_date .Post.PublishedAt }}</a>
{{ if .Categories }}
  <p>
  {{ range .Categories }}
    <a href="{{ url_abs (printf "/categories/%s" .Slug) }}">{{ .Name }}</a>
  {{ end }}
  </p>
{{ end }}