//function say($word) : string {
// return "Hello, " . $word
//}
class Holidays implements HolidayInterface
{
protected $date;
public function __construct($year = null)
{
$y = $year ?? date('Y');
/*
* http://www.php.net/manual/en/datetimeimmutable.construct.php
* only for php 5.5 and more
*/
$this->date = new DateTimeImmutable("January 1, {$y}");
}
public function getMemorial() : DateTimeImmutable
{
return $this->date->modify('last Monday of May');
}
public function getThanksgiving() : DateTimeImmutable
{
return $this->date->modify('fourth Thursday of November');
}
}
$holidays = new Holidays(2016);
$memorial = $holidays->getMemorial();
echo $memorial->format('l, F j, Y') . '<br>';
$thanksgiving = $holidays->getThanksgiving();
echo $thanksgiving->format('l, F j, Y') . '<br>';
$blackFriday = $thanksgiving->modify('+1 day');
echo $blackFriday->format('l, F j, Y') . '<br>';