Yasumi\Yasumi::getAvailableLocales PHP Method

    public static function getAvailableLocales()
    {
        return require __DIR__ . '/data/locales.php';
    }

 /**
  * Creates a new Holiday.
  *
  * If a holiday date needs to be defined for a specific timezone, make sure that the date instance (DateTime) has
  * the correct timezone set. Otherwise the default system timezone is used.
  *
  * @param string   $shortName     The short name (internal name) of this holiday
  * @param array    $names         An array containing the name/description of this holiday in various
  *                                languages. Overrides global translations
  * @param DateTime $date          A DateTime instance representing the date of the holiday
  * @param string   $displayLocale Locale (i.e. language) in which the holiday information needs to be
  *                                displayed in. (Default 'en_US')
  * @param string   $type          The type of holiday. Use the following constants: TYPE_NATIONAL,
  *                                TYPE_OBSERVANCE, TYPE_SEASON, TYPE_BANK or TYPE_OTHER. By default a
  *                                national holiday is considered.
  *
  * @throws UnknownLocaleException
  */
 public function __construct($shortName, array $names, $date, $displayLocale = self::DEFAULT_LOCALE, $type = self::TYPE_NATIONAL)
 {
     // Validate if short name is not empty
     if (empty($shortName)) {
         throw new InvalidArgumentException('Holiday name can not be blank.');
     }
     // Validate if date parameter is instance of DateTime
     if (!$date instanceof DateTime) {
         throw new InvalidArgumentException(sprintf('Date "%s" is not a valid DateTime instance.', $date));
     }
     // Load internal locales variable
     if (!isset(static::$locales)) {
         static::$locales = Yasumi::getAvailableLocales();
     }
     // Assert display locale input
     if (!in_array($displayLocale, static::$locales)) {
         throw new UnknownLocaleException(sprintf('Locale "%s" is not a valid locale.', $displayLocale));
     }
     // Set additional attributes
     $this->shortName = $shortName;
     $this->translations = $names;
     $this->displayLocale = $displayLocale;
     $this->type = $type;
     // Construct instance
     parent::__construct($date->format('Y-m-d'), $date->getTimezone());
 }