Well, this is very funny :)

I have a datepicker localized in Italian. It works correctly, except that, apparently, the abbreviation for Wednesday was translated as it were a personal pronoun, since noi is the Italian translation for we.

screenshot from datepicker, illustrating the error in translation

The abbreviation for Wednesday is correctly set in core/assets/vendor/jquery.ui/ui/i18n/datepicker-it.js, but this file is not inserted in the HTML, so I suppose the translation is taken somewhere else.

In my libraries dependencies I have the following code.

  - core/jquery
  - core/jquery.once
  - core/jquery.ui.datepicker
  - core/drupal.locale.datepicker

Without the last line, the date picker is in English.

Am I doing something wrong?

  • I guess the problem is in core/modules/locale/locale.datepicker.js at line 20, where dayNamesMin[3] is set to Drupal.t('We'): it doesn't seem like a good idea, does it? Is it reasonable to report it as a bug in core? Sep 17, 2018 at 9:22

1 Answer 1


I think you should download Italian initialisation jQuery UI js file and attached to your concerned page in your module or theme.

  • But that is a jQuery UI file not adapted to the Drupal environment, isn't it? If I compare it to core/modules/locale/locale.datepicker.js, which is where Drupal.t('We') occurs, I can see that the code is not run in a behavior. I would anyway be surprised that such a basic configuration would require the download of a file from another project... even since the translation works, the problem is that translating "We" is not a good idea! Sep 17, 2018 at 9:17
  • Here is a code snnipet from date_popup_load to load english version of ui datepicker if (module_exists('jquery_ui')) { jquery_ui_add('ui.datepicker'); // Add i18n support global $language; if ($language->language != 'en') { drupal_add_js (JQUERY_UI_PATH.'/ui/i18n/ui.datepicker-'.($language->language).'.js'); } } try to implement the same in hook_library_info_build to load ui datepicker-it .
    – berramou
    Sep 17, 2018 at 9:57
  • hook_library_info_build
    – berramou
    Sep 17, 2018 at 10:02
  • But why should I reimplement something that is present and working? The only problem is that it does incorrectly translate the abbreviation for Wednesday. If this won't get corrected, I think I'll simply have to override core/modules/locale/locale.datepicker.js... Sep 17, 2018 at 10:14
  • 1
    @PonzioPilato, unfortunately I didn't solve it. I simply changed the translation of "We" to "Me", it works as long as I don't have a "We" in the interface... Apr 4, 2019 at 11:35

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