{% capture date %}{{ page.date }}{{ post.date }}{% endcapture %}

 {% capture date_formatted %}{{ page.date_formatted }}{{ post.date_formatted }}{% endcapture %}

 {% capture has_date %}{{ date | size }}{% endcapture %}

 {% if has_date != '0' %}

   {% capture time %}<time datetime="{{ date | datetime | date_to_xmlschema }}" pubdate>{{ date_formatted }}</time>{% endcapture %}

 {% endif %}