diff --git a/core/includes/config.inc b/core/includes/config.inc
index 2857c68..c7362a2 100644
--- a/core/includes/config.inc
+++ b/core/includes/config.inc
@@ -179,6 +179,19 @@ function config_context_leave() {
 }
 
 /**
+ * Gets the current config context.
+ *
+ * @see config_context_enter()
+ * @see config_context_leave()
+ * @see \Drupal\Core\Config\ConfigFactory
+ */
+function config_context() {
+  drupal_container()
+    ->get('config.factory')
+    ->getContext();
+}
+
+/**
  * Return a list of all config entity types provided by a module.
  *
  * @param string $module
diff --git a/core/lib/Drupal/Core/Datetime/Date.php b/core/lib/Drupal/Core/Datetime/Date.php
index 8f5831a..63b601b 100644
--- a/core/lib/Drupal/Core/Datetime/Date.php
+++ b/core/lib/Drupal/Core/Datetime/Date.php
@@ -8,6 +8,7 @@
 namespace Drupal\Core\Datetime;
 
 use Drupal\Component\Utility\Xss;
+use Drupal\Core\Config\Context\LanguageConfigContext;
 use Drupal\Core\Datetime\DrupalDateTime;
 use Drupal\Core\Entity\EntityManager;
 use Drupal\Core\Language\Language;
@@ -130,16 +131,26 @@ public function format($timestamp, $type = 'medium', $format = '', $timezone = N
   /**
    * Loads the given format pattern for the given langcode.
    *
-   * @param string $format The machine name of the date format.
-   * @param string $langcode The langcode of the language to use.
-   * If NULL, we load the interface language format pattern.
-   * @return string The pattern for the date format in the given language.
+   * @param string $format
+   *   The machine name of the date format.
+   * @param string $langcode
+   *   The langcode of the language to use. If NULL, we load the current context
+   *   language if any or the interface language format pattern as the last fallback.
+   * @return string
+   *   The pattern for the date format in the given language.
    */
   protected function dateFormat($format, $langcode = NULL) {
     // If a langcode is not given, we use the interface language.
     $needs_language_context = !empty($langcode);
     if (!$needs_language_context) {
-      $langcode = $this->languageManager->getLanguage(Language::TYPE_INTERFACE)->id;
+      // If we are at any context we try to get the language from there.
+      $context = config_context();
+      if ($context !== NULL && $contextLanguage = $context->get(LanguageConfigContext::LANGUAGE_KEY)) {
+        $langcode = $contextLanguage;
+      }
+      else {
+        $langcode = $this->languageManager->getLanguage(Language::TYPE_INTERFACE)->id;
+      }
     }
     if (!isset($this->dateFormats[$format][$langcode])) {
       // Enter a language specific context for the language if some language is