DateTime::setValue

public function setValue($value): self
{
	if ($value instanceof MainTypeDateTime)
	{
		$this->value = $value;
	}
	elseif ($value instanceof DateTime)
	{
		$this->value = MainTypeDateTime::createFromPhp($value);
	}
	else
	{
		$this->value = MainTypeDateTime::createFromTimestamp((int)$value);
	}

	return $this;
}