WP_Customize_Date_Time_Control::json()

	public function json() {
		$data = parent::json();

		$data['maxYear'] = intval( $this->max_year );
		$data['minYear'] = intval( $this->min_year );
		$data['allowPastDate'] = (bool) $this->allow_past_date;
		$data['twelveHourFormat'] = (bool) $this->twelve_hour_format;
		$data['includeTime'] = (bool) $this->include_time;

		return $data;
	}