diff --git a/_includes/_meta_information.html b/_includes/_meta_information.html
index 00c1cc7a735..28913cec7f9 100644
--- a/_includes/_meta_information.html
+++ b/_includes/_meta_information.html
@@ -9,7 +9,7 @@
 				{% endif %}
 
 				{% if page.date %}
-				<time class="icon-calendar pr20" datetime="{{ page.date | date: "%Y-%m-%d" }}" itemprop="datePublished"> {{ page.date | date: "%Y-%m-%d" }}</time>
+				<time class="icon-calendar pr20" datetime="{{ page.date | date_to_xmlschema }}" itemprop="datePublished"> {{ page.date | date: "%Y-%m-%d" }}</time>
 				{% endif %}
 
 				{% if page.categories %}<span class="icon-archive pr20"> {{ page.categories | join: ' · ' | upcase }}{% endif %}</span>