{% assign postsByYear = site.posts | group_by_exp:"post", "post.date | date: '%Y'" %} {% for year in postsByYear %}

{{ year.name }}

{% assign postsByMonth = year.items | group_by_exp:"post", "post.date | date: '%B'" %}

{% for month in postsByMonth %}

{{ month.name }}

{% for post in month.items %}
• {{ post.title }}
{% endfor %}

{% endfor %} {% endfor %}