Show day on post page

_includes/postslist.njk

@@ -2,7 +2,7 @@
 {% for post in postslist | reverse %}
   <li class="postlist-item{% if post.url == url %} postlist-item-active{% endif %}">
     <a href="{{ post.url | url }}" class="postlist-link">{% if post.data.title %}{{ post.data.title }}{% else %}<code>{{ post.url }}</code>{% endif %}</a>
-    <time class="postlist-date" datetime="{{ post.date | htmlDateString }}">{{ post.date | readableDate }}</time>
+    <time class="postlist-date" datetime="{{ post.date | htmlDateString }}">{{ post.date | readableDate("LLLL yyyy") }}</time>
   </li>
 {% endfor %}
 </ol>