website-theme/layouts/_default/list.html

{{ define "main"}}
    <div>
        {{ range $index, $value := .Pages.GroupByDate "January, 2006" }}
        {{ if (ne $index 0) }}
        <hr class="separator">
        {{ end }}
        <p class="date">{{ .Key }}</p>
        {{ range .Pages }}
            <p><a href="{{ .Permalink }}">{{ .Title }}</a></p>
        {{ end }}
        {{ end }}
    </div>
{{ end }}