diff --git a/agaric/templates/layout/node--full.html.twig b/agaric/templates/layout/node--full.html.twig
index f62258d..5bb5c70 100644
--- a/agaric/templates/layout/node--full.html.twig
+++ b/agaric/templates/layout/node--full.html.twig
@@ -108,7 +108,7 @@
         </div>
         {% if content.field_authors is not empty %}
           <p class="byline is-mono">Written by {{ content.field_authors }}</p>
-          <p class="byline is-mono">Posted on {{ date }}</p>
+          <p class="byline is-mono">Posted on <time class="dt-published" datetime="{{ iso_datetime }}">{{ date }}</time></p>
         {% endif %}
       </div>
     </div>