function register_initial_settings() {
  register_setting(
    'general',
    'blogname',
    array(
      'show_in_rest' => array(
        'name' => 'title',
      ),
      'type'         => 'string',
      'description'  => __( 'Site title.' ),
    )
  );

  register_setting(
    'general',
    'blogdescription',
    array(
      'show_in_rest' => array(
        'name' => 'description',
      ),
      'type'         => 'string',
      'description'  => __( 'Site tagline.' ),
    )
  );

  if ( ! is_multisite() ) {
    register_setting(
      'general',
      'siteurl',
      array(
        'show_in_rest' => array(
          'name'   => 'url',
          'schema' => array(
            'format' => 'uri',
          ),
        ),
        'type'         => 'string',
        'description'  => __( 'Site URL.' ),
      )
    );
  }

  if ( ! is_multisite() ) {
    register_setting(
      'general',
      'admin_email',
      array(
        'show_in_rest' => array(
          'name'   => 'email',
          'schema' => array(
            'format' => 'email',
          ),
        ),
        'type'         => 'string',
        'description'  => __( 'This address is used for admin purposes, like new user notification.' ),
      )
    );
  }

  register_setting(
    'general',
    'timezone_string',
    array(
      'show_in_rest' => array(
        'name' => 'timezone',
      ),
      'type'         => 'string',
      'description'  => __( 'A city in the same timezone as you.' ),
    )
  );

  register_setting(
    'general',
    'date_format',
    array(
      'show_in_rest' => true,
      'type'         => 'string',
      'description'  => __( 'A date format for all date strings.' ),
    )
  );

  register_setting(
    'general',
    'time_format',
    array(
      'show_in_rest' => true,
      'type'         => 'string',
      'description'  => __( 'A time format for all time strings.' ),
    )
  );

  register_setting(
    'general',
    'start_of_week',
    array(
      'show_in_rest' => true,
      'type'         => 'integer',
      'description'  => __( 'A day number of the week that the week should start on.' ),
    )
  );