src/_components/posts/_post.liquid
<div class="post-thumbnail">
<h3 class="post-thumbnail__title">
<a href="{{ post.url }}">
{{ post.title }}
</a>
</h3>
<p class="post-thumbnail__datetime">
<time datetime="{{ post.date | date: "%Y-%m-%d" }}">
{% assign d = post.date | date: "%-d" %}
{{ post.date | date: "%B" }}
{% case d %}
{% when '1' or '21' or '31' %}{{ d }}st,
{% when '2' or '22' %}{{ d }}nd,
{% when '3' or '23' %}{{ d }}rd,
{% else %}{{ d }}th,
{% endcase %}
{{ post.date | date: "%Y" }}
</time>
</p>
<p>
{{ post.description }}
</p>
</div>