DatePeriods::currentWeekLastDay

public function currentWeekLastDay(): Date
{
	$date = clone $this->userCurrentDateTime;
	$weekStartDay = $this->culture->getWeekStart();
	$todayDay = (int)$date->format('w');
	$daysToAdd = ($todayDay >= $weekStartDay)
		? (6 - $todayDay + $weekStartDay)
		: $weekStartDay - $todayDay - 1
	;
	if ($daysToAdd > 0)
	{
		$date->add('+' . $daysToAdd . ' days');
	}
	return Date::createFromTimestamp($date->getTimestamp());
}