Filtering WP_Query based on wp_postmeta keys values

This is the answer to my question:

$args = array(
        'post_type' => 'myType',
        'post_per_page' => $number,
        'showposts' => $number,
        'meta_query' => array(
            array(
                'key'       => 'month',  
                'value'     => array(date("F"),date("F", strtotime('+1 month'))),
                'compare'   => 'IN'
            ),
            array(
                'key'       => 'day',  
                'value'     => date("j"),
                'compare'   => '>='
            ),
            array(
                'key'       => 'year',  
                'value'     => date("Y"),
                'compare'   => '='
            ),
        ),
    );

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