Start and end time changes on every save

function hikashop_getTime($date, $format = '%d %B %Y %H:%M') {
	static $timeoffset = null;
	// get timezone offset from Joomla
	if($timeoffset === null){
		$config = JFactory::getConfig();
		if(!HIKASHOP_J30){
			$timeoffset = $config->getValue('config.offset');
		} else {
			$timeoffset = $config->get('offset');
		}
		$dateC = JFactory::getDate('now', $timeoffset);
		$timeoffset = $dateC->getOffsetFromGMT(true);
	}
	if(!is_numeric($date)) {
		// convert date into UTC timestamp
		$format = str_replace(array('%A','%d','%B','%m','%Y','%y','%H','%M','%S','%a'), array('l','d','F','m','Y','y','H','i','s','D'), hikashop_getDateFormat($format));
		try {
			$dateTime = DateTime::createFromFormat($format, $date, new DateTimeZone('UTC'));
			if($dateTime)
				$date = $dateTime->getTimestamp();
			else
				$date = strtotime(str_replace('-','/', $date));
		} catch( Exception $e) {
			$date = strtotime(str_replace('-','/', $date));
		}
	}
	if($date === false)
		return false;
	// account for timezone offset
	return $date - $timeoffset *60*60 + date('Z', $date);
}

function hikashop_getTime($date, $format = '%d %B %Y %H:%M') {
	static $timeoffset = null;
	static $timeZone = null;
	// get timezone offset from Joomla
	if($timeoffset === null){
		$config = JFactory::getConfig();
		if(!HIKASHOP_J30){
			$timeZone = $config->getValue('config.offset');
		} else {
			$timeZone = $config->get('offset');
		}
		$dateC = JFactory::getDate('now', $timeZone);
		$timeoffset = $dateC->getOffsetFromGMT(true);
	}
	if(!is_numeric($date)) {
		// convert date into UTC timestamp
		$format = str_replace(array('%A','%d','%B','%m','%Y','%y','%H','%M','%S','%a'), array('l','d','F','m','Y','y','H','i','s','D'), hikashop_getDateFormat($format));
		try {
			$dateTime = DateTime::createFromFormat($format, $date, new DateTimeZone($timeZone));
			if($dateTime) {
				$date = $dateTime->getTimestamp();
			}else {
				$date = strtotime(str_replace('-','/', $date));
				if($date === false)
					return false;
				// account for timezone offset
				return $date - $timeoffset *60*60 + date('Z', $date);
			}
		} catch( Exception $e) {
			$date = strtotime(str_replace('-','/', $date));
			if($date === false)
				return false;
			// account for timezone offset
			return $date - $timeoffset *60*60 + date('Z', $date);
		}

	}
	return $date;
}