1. Go to this page and download the library: Download nyg/holiday library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
nyg / holiday example snippets
php
use nyg\Holiday;
$holiday=new holiday();
$result = $holiday->isHoliday(time());