public function __construct($daysOfWeek, $hour = 0, $minute = 0, $second = 0)
{
$this->daysOfWeek = (int) $daysOfWeek;
$timeOfDay = new DateTime();
$this->timeOfDay = $timeOfDay->setTime($hour, $minute, $second)->setTimeZone(new DateTimeZone('UTC'))->format('H:i:s');
}