Fix date format

_includes/footer.html

 <footer>
   <p>
     <a href="/changelog.html">
+      {% assign date_format =  "%Y-%m-%d" %}
       {% if page and page.date %}
       <time datetime="{{ page.date  | date_to_xmlschema}}" itemprop="datePublished">
-      {% assign date_format =  "%c" %}
       {{ page.date | date: date_format }}</time></a> {% comment %}/a tag here to prevent
                                                                   whitespace in the link {% endcomment %}
       {% else %}
       <time datetime="{{ site.time  | date_to_xmlschema}}">
-      {% assign date_format =  "%c" %}
       {{ site.time | date: date_format }}</time></a>
       {% endif %}
 

_layouts/post.html

@@ -5,11 +5,11 @@ layout: default
   <header>
     <div>
     <time datetime="{{ page.date | date_to_xmlschema }}" itemprop="datePublished">
-      {% assign date_format =  "%c" %}
+      {% assign date_format =  "%Y-%m-%d" %}
       {{ page.date | date: date_format }}
     </time>
     {% for tag in page.tags %}
-    <a rel="tag" href="{{ tag | prepend:"tag/" | relative_url }}">{{ tag }}</a>
+    <a rel="tag" href="{{ tag | prepend:"tag/" | relative_url }}.html">{{ tag }}</a>
     {% endfor %}
     </div>
   </header>

assets/main.css

@@ -94,6 +94,7 @@ article header div {
   left: 1em;
   top: 7em;
   font-size: 0.8em;
+  font-weight: bold;
 }
 a[rel=tag]:before{
   content: "[";