Archives by month using Craft CMS

Start with some navigation:

{% set allEntries = craft.entries.section('blog').find() %}
{% set entriesByMonth = allEntries|group("postDate.format('Y-m')") %}
{% for month, entries in entriesByMonth %}
<a href="{{ siteUrl }}blog/archive/{{ month }}">{{ month|date('F Y') }} ({{ entries|length }})</a>
{% endfor %}

Set a route within Craft like which looks like blog/archive/year-month and choose a template. In the chosen template, set some vars:

{% if year is not defined %}
	{% set year = now.year %}
{% endif %}
{% if month is not defined %}
	{% set month = now.month %}
{% endif %}
{% if month != 12 %}
	{% set nextmonth = month+1 %}
	{% set nextyear = year %}
{% else %}
	{% set nextmonth = 01 %}
	{% set nextyear = year+1 %}
{% endif %}

Then, display the entries:

{% set entries = craft.entries.section('blog').depth(2).limit(null).after(year ~ '-' ~ month).before(nextyear ~ '-' ~ nextmonth).find() %}
{% for entry in entries %}	
	{{ entry.title }}
{% endfor %}

Updated: 18th December 2013