Repeat holiday every year

[deib97]

I want to input holiday once for next every year. How to schedule a yearly repeating holiday when i change year?. example : Xmas

I have a code :

<?php
for($i=2013; $i<=2020; $i++)
{
  $datetime = new DateTime("$i-12-25 00:00:00");
     echo "25 Dec $i<br>";
}
?>

[Barand]

$d1 = new DateTime('2013-12-25');

$dp = new DatePeriod($d1, new DateInterval('P1Y'), 7);


foreach ($dp as $dt) {

    echo $dt->format('jS F Y') . '<br>';

}


/* OUTPUT *****

25th December 2013

25th December 2014

25th December 2015

25th December 2016

25th December 2017

25th December 2018

25th December 2019

25th December 2020

*/