Custom Post Types Not acknowledged for date.php template

Date archives default to querying just the post post type, you can add additional post types to those queries via the pre_get_posts action

function wpa_date_archive_post_types( $query ){
    if( $query->is_main_query() && $query->is_date() ):
        $query->set( 'post_type', array( 'post', 'your_custom_type' ) );
    endif;
}
add_action( 'pre_get_posts', 'wpa_date_archive_post_types' );