{% macro shouldDisplayOldPostMessage(post) %}
    {% set cutOffDate = 'today -1 year'|date('U') %}
    {{ post.date <= cutOffDate }}
{% endmacro %}

{% import _self as helpers %}

{% if helpers.shouldDisplayOldPostMessage(post)|trim %}
      <div class="p-6 my-10 border border-gray-300 dark:bg-gray-800 dark:border-gray-700">
          <p><strong>Warning:</strong> This post is over a year old. I don't always update old posts with new information, so some of this information may be out of date.</p>
      </div>
{% endif %}