* @since 3.0.0
	 * @since 3.7.0 Unknown.
	 *
	 * @return boolean
	 */
	public function is_enrollment_open() {

		// If no period is set, enrollment is automatically open.
		if ( 'yes' !== $this->get( 'enrollment_period' ) ) {

			$is_open = true;

		} else {

			$is_open = ( $this->has_date_passed( 'enrollment_start_date' ) && ! $this->has_date_passed( 'enrollment_end_date' ) );