public function getResizeParams($day_delta = 0, $minute_delta = 0) {
		// calculate new dates
		$end_timestamp = $this->getEndTimestamp();

		$new_end_timestamp = $end_timestamp + ($day_delta * Util::SECONDS_IN_A_DAY) + ($minute_delta * Util::SECONDS_IN_A_MINUTE);

		$params = array(
			'entity' => $this,
			'new_end_timestamp' => $new_end_timestamp,
			'new_end_date' => date('Y-m-d', $new_end_timestamp),
			'new_end_time' => date('g:ia', $new_end_timestamp)
		);

		return $params;
	}