Islamic date using pure PHP

intl.php

<?php
/*
 * Requirement: PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0
 * Ubuntu: 
 *        apt-get install php5-intl
 *
 * RedHat: 
 *        yum install libicu libicu-devel.x86_64
*/

// full date
$DateTime = new DateTime();
$date = new IntlDateFormatter(
    'ms_MY@calendar=islamic',
    IntlDateFormatter::FULL,
    IntlDateFormatter::FULL,
    'Asia/Kuala_Lumpur',
    IntlDateFormatter::TRADITIONAL,
);
echo $date->format($DateTime);
echo $date->getPattern();

// custom format
$DateTime = new DateTime();
$date = new IntlDateFormatter(
    'ms_MY@calendar=islamic',
    IntlDateFormatter::FULL,
    IntlDateFormatter::FULL,
    'Asia/Kuala_Lumpur',
    IntlDateFormatter::TRADITIONAL,
    'd MMMM y'
);
echo $date->format($DateTime);
echo $date->getPattern();
?>