display future posts in date page

You can alter the query with pre_get_posts before it’s run to include future posts:

function wpd_future_date_archives( $query ){
    if( $query->is_date() && $query->is_main_query() ) {
        $query->set( 'post_status', array( 'publish', 'future' ) );
    }
}
add_action( 'pre_get_posts', 'wpd_future_date_archives' );

The posts won’t behave the same as published posts though- they have no pretty permalink until they’re published.