Magento2 simple check script for CJK

check.php

<?php
$lang = ['ja_JP','ko_KR','zh_Hans_CN','zh_Hant_TW','en_US'];

foreach($lang as $_lang) {
    $bundle = new \ResourceBundle($_lang, 'ICUDATA');

    $icuData = iterator_to_array($bundle['calendar']['gregorian']['monthNames']['format']);

    if(array_key_exists('abbreviated', $icuData))
    {
      echo $_lang . " is available on your env.\n";
    } else {
      echo $_lang . " is not available on your env.\n";
    }
}

Amazon Linux(2016.03.3) + php70 packages is same.

Magento 2.1.2 + CentOS7.2 + php56u
not available = ja_JP, ko_KR

Yes, I understand the issue but what should I do now to remove this error.
error: Fatal error: Uncaught TypeError: Argument 1 passed to iterator_to_array() must implement interface Traversable, null given in /home/rozander/public_html/epicdashcam.com/vendor/magento/framework/View/Element/Html/Calendar.php:86 Stack trace: #0 /home/rozander/public_html/epicdashcam.com/vendor/magento/framework/View/Element/Html/Calendar.php(86): iterator_to_array(NULL) #1 /home/rozander/public_html/epicdashcam.com/vendor/magento/framework/View/Element/AbstractBlock.php(659): Magento\Framework\View\Element\Html\Calendar->_toHtml() #2 /home/rozander/public_html/epicdashcam.com/vendor/magento/framework/View/Layout.php(542): Magento\Framework\View\Element\AbstractBlock->toHtml() #3 /home/rozander/public_html/epicdashcam.com/vendor/magento/framework/View/Layout.php(518): Magento\Framework\View\Layout->_renderBlock('head.calendar') #4 /home/rozander/public_html/epicdashcam.com/var/generation/Magento/Framework/View/Layout/Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('head.calendar') #5 /home/rozand in /home/rozander/public_html/epicdashcam.com/vendor/magento/framework/View/Element/Html/Calendar.php on line 86

Now, I cannot come into backend because of this issue. how would I solve this issue anyhow that can be a patch or something else but how would I solve this issue?