here is my code but doesnt work:
function my_acf_load_field( $field ) {
$current_date = get_sub_field('data');
$trimmed = substr($current_date, -7);
$field['default_value'] = $trimmed;
$field['disabled'] = 1;
return $field;
}
add_filter('acf/load_field/name=month_year', 'my_acf_load_field');