Display date for posts

blog/templates/page.html

@@ -4,6 +4,7 @@
 
 {% block main %}
     <h1>{{ page.title }}</h1>
+    <time datetime="{{ page.date | date(format="%Y-%m-%d") }}" class="post-date">{{ page.date | date(format="%b %d, %Y") }}</time>
     {{ page.content | safe }}
 {% endblock main %}