Convert datetime in db into local datetime

index.php

<?php
/**
 * Convert datetime in db into local datetime
 * @param  string $datetime
 * @param  string $format
 * @param  string $timezone
 * @return String
 */
public static function convert_datetime_to_local($datetime, $format = 'H:i d-m-Y', $timezone = 'Asia/Ho_Chi_Minh')
{
    $userTimezone = new \DateTimeZone($timezone);
    $gmtTimezone = new \DateTimeZone('UTC');
    $myDateTime = new \DateTime($datetime, $gmtTimezone);
    $offset = $userTimezone->getOffset($myDateTime);
    $myInterval = \DateInterval::createFromDateString((string) $offset . 'seconds');
    $myDateTime->add($myInterval);
    return $myDateTime->format($format);
}

format in js: HH:mm DD:MM:YYYY

https://momentjscom.readthedocs.io/en/latest/moment/04-displaying/01-format/