diff --git a/pelican/themes/simple/templates/article.html b/pelican/themes/simple/templates/article.html
index 48464ce4..fb01b337 100644
--- a/pelican/themes/simple/templates/article.html
+++ b/pelican/themes/simple/templates/article.html
@@ -21,13 +21,13 @@
  {{ translations.translations_for(article) }}
   </header>
   <footer class="post-info">
-    <abbr class="published" title="{{ article.date.isoformat() }}">
+    <time class="published" datetime="{{ article.date.isoformat() }}">
       {{ article.locale_date }}
-    </abbr>
+    </time>
 	{% if article.modified %}
-    <abbr class="modified" title="{{ article.modified.isoformat() }}">
+    <time class="modified" datetime="{{ article.modified.isoformat() }}">
       {{ article.locale_modified }}
-    </abbr>
+    </time>
 	{% endif %}
     {% if article.authors %}
     <address class="vcard author">
diff --git a/pelican/themes/simple/templates/index.html b/pelican/themes/simple/templates/index.html
index 4bd81985..ab4bc345 100644
--- a/pelican/themes/simple/templates/index.html
+++ b/pelican/themes/simple/templates/index.html
@@ -10,7 +10,7 @@
         <li><article class="hentry">
                 <header> <h2 class="entry-title"><a href="{{ SITEURL }}/{{ article.url }}" rel="bookmark" title="Permalink to {{ article.title|striptags }}">{{ article.title }}</a></h2> </header>
                 <footer class="post-info">
-                    <abbr class="published" title="{{ article.date.isoformat() }}"> {{ article.locale_date }} </abbr>
+                    <time class="published" datetime="{{ article.date.isoformat() }}"> {{ article.locale_date }} </time>
                     <address class="vcard author">By
                     {% for author in article.authors %}
                         <a class="url fn" href="{{ SITEURL }}/{{ author.url }}">{{ author }}</a>