/**
  * gets the date and timezone of business and converts it to user/browser timezone
  * @param $date
  * @param $business_timezone
  * @param $user_timezone
  * @return string
  */
 public static function changeBusinessTimeTimezone($date, $business_timezone, $browser_timezone)
 {
     if (is_numeric($browser_timezone)) {
         $browser_timezone = Helper::timezoneOffsetToName($browser_timezone);
     }
     $datetime = new DateTime($date, new DateTimeZone($business_timezone));
     $datetime->setTimezone(new DateTimeZone($browser_timezone));
     return $datetime->format('g:i A');
 }