hehe.org/user/themes/hehe/templates/partials/blog/date.html.twig

<span class="blog-date">
    <time class="dt-published" datetime="{{ page.date|date("c") }}">
        <i class="fa fa-calendar"></i> {{ page.header.date|date("d-m-y") }}

        {% if page.header.date_end %}

          - <i class="fa fa-calendar"></i> {{ page.header.date_end|date("d-m-y") }}

        {% endif %}

    </time>
</span>