Add select fields for month and year to date field

prefix_date_field_params_change_month.php

<?php
/**
 * Add select fields for month and year to date field
 */
function prefix_date_field_params_change_month( $params, $item ) {
  
	$params[] = "changeMonth: true";
	$params[] = "changeYear: true";
	$params[] = "yearRange: '1900:2030'";
	return $params;
  
}
add_filter( 'pewc_filter_date_field_params', 'prefix_date_field_params_change_month', 10, 2 );