Custom Post Type Create New Event Section

Under functions.php page register new Post Type problem with this is taht if you change theme’s this would dissapear, so it’s better to use MUST USE PLUGINS

//Create New Post Type Here
function custom_post_types(){
    register_post_type('event', array(

        //Make it public
        'public' => true,
        //Admin Left Navigation Label here
        'labels' => array(
            'name' => 'Events'
        ),
        //Icon Label
        'menu_icon' => 'dashicons-calendar'

    ));
}
add_action('init', 'custom_post_types');