@andremacola
I achieved this in a meta_query by using REGEXP. I couldn’t find a way to do it with just dates and a range, because like you I wanted it to be year-agnostic.
The date format by default is stored as YYYYMMDD. The following searches for a string like $$$$MM$$, where MM is your month. In other words, any 4 digits, followed by a specified 2-digit month, followed by any 2 digits.
$filter_month = '09'; // show september only
$args = array (
'post_type' => 'course', // your custom post type
'meta_key' => 'course_date', // your custom date field name
'orderby' => 'meta_value_num',
'order' => 'ASC',
'meta_query' => array(
array(
'key' => 'course_date',
'compare' => 'REGEXP',
'value' => '[0-9]{4}' . $filter_month . '[0-9]{2}',
),
)
);
$posts = get_posts($args);
A little late, but hope this helps.
