php timezone

date_default_timezone_set("Asia/Kolkata");
// List of Supported Timezones https://www.php.net/manual/en/timezones.php

<?php
$date = new DateTime("now", new DateTimeZone('America/New_York') );
echo $date->format('Y-m-d H:i:s');

echo date_default_timezone_get(); //UTC

//Read more at https://www.php.net/manual/en/function.date-default-timezone-get.php

date_default_timezone_set('America/Los_Angeles'); // or wherever you are

$time = time();

if ($time >= strtotime("Second Sunday March 0")  && $time < strtotime("First Sunday November 0")) 
{

    echo date('m/d/y h:i a', $time);

} else {

    echo date('m/d/y h:i a', $time);

}

date_default_timezone_set("Asia/Karachi");
//if you wand your timezone in whole website than go to config/app.php
// and serch for timezone, now pass your time zone. in my case
'timezone' => 'Asia/Karachi',
//Go to following link to find your timezone
// https://www.php.net/manual/en/timezones.asia.php