I just want a simple list with the monthly archives for one specific year. Like so:

• January
• February
• March
• April
• etc.

I don’t need anything fancy like yearly grouping. Ideally I would like a shortcode like this [month-archive year=2019]. This is how far I’ve come but the ‘Year’ parameter does not seem to do anything.

function my_monthly_archives() { 

$my_archives = wp_get_archives(array(
    'type'=>'monthly', 
    'limit'=>10,
    'echo'=>0,
    'year'=>'2018'
));

return $my_archives; 

} 

// Create a shortcode
add_shortcode('month-archive', 'my_monthly_archives'); 

// Enable shortcode execution in text widget
add_filter('widget_text', 'do_shortcode');