system/I18n/Time.php
public function toDateTime()
	{
		$dateTime = new DateTime(null, $this->getTimezone());
		$dateTime->setTimestamp(parent::getTimestamp());

		return $dateTime;
	}
public function toDateTime()
	{
		$dateTime = new DateTime(null, $this->getTimezone());
		$dateTime->setTimestamp(parent::getTimestamp());

		return $dateTime;
	}
Converts the current instance to a mutable DateTime object.

@return \DateTime
@throws \Exception