diff --git a/core/config/schema/core.data_types.schema.yml b/core/config/schema/core.data_types.schema.yml
index ea67e43..60628fb 100644
--- a/core/config/schema/core.data_types.schema.yml
+++ b/core/config/schema/core.data_types.schema.yml
@@ -72,6 +72,7 @@ date_format:
   type: string
   label: 'Date format'
   translatable: true
+  translation context: 'PHP date format'
 
 # HTML color value.
 color_hex:
diff --git a/core/modules/locale/src/LocaleTypedConfig.php b/core/modules/locale/src/LocaleTypedConfig.php
index cbe9d1a..ab373fe 100644
--- a/core/modules/locale/src/LocaleTypedConfig.php
+++ b/core/modules/locale/src/LocaleTypedConfig.php
@@ -167,7 +167,7 @@ protected function getArrayTranslation(ArrayElement $element, array $options) {
    * Translatable elements may use these additional keys in their data
    * definition:
    * - 'translatable', FALSE to opt out of translation.
-   * - 'locale context', to define the string context.
+   * - 'translation context', to define the string context.
    *
    * @param \Drupal\Core\TypedData\TypedDataInterface $element
    *   Configuration element.
@@ -184,7 +184,7 @@ protected function translateElement(\Drupal\Core\TypedData\TypedDataInterface $e
       $definition = $element->getDataDefinition();
       $value = $element->getValue();
       if ($value && !empty($definition['translatable'])) {
-        $context = isset($definition['locale context']) ? $definition['locale context'] : '';
+        $context = isset($definition['translation context']) ? $definition['translation context'] : '';
         if ($translation = $this->localeConfig->translateString($this->name, $options['target'], $value, $context)) {
           $element->setValue($translation);
           return TRUE;
diff --git a/core/modules/locale/src/Tests/LocaleConfigTranslationTest.php b/core/modules/locale/src/Tests/LocaleConfigTranslationTest.php
index ac6bb2d..a28f996 100644
--- a/core/modules/locale/src/Tests/LocaleConfigTranslationTest.php
+++ b/core/modules/locale/src/Tests/LocaleConfigTranslationTest.php
@@ -92,7 +92,7 @@ public function testConfigTranslation() {
     $this->assertText($site_name, 'The translated site name is displayed after translations refreshed.');
 
     // Check default medium date format exists and create a translation for it.
-    $string = $this->storage->findString(array('source' => 'D, m/d/Y - H:i', 'context' => '', 'type' => 'configuration'));
+    $string = $this->storage->findString(array('source' => 'D, m/d/Y - H:i', 'context' => 'PHP date format', 'type' => 'configuration'));
     $this->assertTrue($string, 'Configuration date formats have been created upon installation.');
 
     // Translate using the UI so configuration is refreshed.