Archive page - only show posts from certain month
There's probably a cleaner way to go about this, but something like this should work:

{# These are probably coming from the querystring, but I'll hard code them here #}
{% set year = 2015 %}
{% set month = 'July' %}

{% set entriesInYear = craft.entries.section('news').limit(null).after(year).before(year+1) %}
{% set groupedEntries =  entriesInYear | group("postDate|date('F')") %}

&lt;h2&gt;{{ month }}&lt;/h2&gt;
&lt;ul&gt;
    {% for entry in groupedEntries[month] %}
        &lt;li&gt;{{ entry.getLink() }}&lt;/li&gt;
    {% endfor %}
&lt;/ul&gt;


You'll probably want to add error checking and validation in case no entries exist for the month or the month/year is invalid, etc.