diff --git a/.gitignore b/.gitignore
index 010db53e..a0f6acf5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,6 +19,7 @@
 
 
 .idea/
+.idea/*
 ###> symfony/webpack-encore-bundle ###
 /node_modules/
 /public/build/
diff --git a/.idea/php.xml b/.idea/php.xml
index 9a39bcf2..f82df923 100644
--- a/.idea/php.xml
+++ b/.idea/php.xml
@@ -113,6 +113,7 @@
       <path value="$PROJECT_DIR$/vendor/doctrine/persistence" />
       <path value="$PROJECT_DIR$/vendor/ocramius/proxy-manager" />
       <path value="$PROJECT_DIR$/vendor/symfony/webpack-encore-bundle" />
+      <path value="$PROJECT_DIR$/vendor/twig/extensions" />
     </include_path>
   </component>
   <component name="PhpProjectSharedConfiguration" php_language_level="7.1" />
diff --git a/composer.json b/composer.json
index 48466cdb..dfa51fca 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,9 @@
         "symfony/validator": "4.2.*",
         "symfony/web-link": "4.2.*",
         "symfony/webpack-encore-bundle": "^1.1",
-        "symfony/yaml": "4.2.*"
+        "symfony/yaml": "4.2.*",
+        "twig/extensions": "^1.5",
+        "webmozart/assert": "^1.4"
     },
     "require-dev": {
         "symfony/debug-pack": "*",
diff --git a/composer.lock b/composer.lock
index b50dd9cc..71d938f9 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "54e0b48ecf19934241734a4229c9b47f",
+    "content-hash": "b7f3621e8185fed6caafdf0430d434c3",
     "packages": [
         {
             "name": "doctrine/annotations",
@@ -5147,6 +5147,61 @@
             "homepage": "https://symfony.com",
             "time": "2019-02-23T15:17:42+00:00"
         },
+        {
+            "name": "twig/extensions",
+            "version": "v1.5.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/twigphp/Twig-extensions.git",
+                "reference": "57873c8b0c1be51caa47df2cdb824490beb16202"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/twigphp/Twig-extensions/zipball/57873c8b0c1be51caa47df2cdb824490beb16202",
+                "reference": "57873c8b0c1be51caa47df2cdb824490beb16202",
+                "shasum": ""
+            },
+            "require": {
+                "twig/twig": "^1.27|^2.0"
+            },
+            "require-dev": {
+                "symfony/phpunit-bridge": "^3.4",
+                "symfony/translation": "^2.7|^3.4"
+            },
+            "suggest": {
+                "symfony/translation": "Allow the time_diff output to be translated"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.5-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Twig_Extensions_": "lib/"
+                },
+                "psr-4": {
+                    "Twig\\Extensions\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                }
+            ],
+            "description": "Common additional features for Twig that do not directly belong in core",
+            "keywords": [
+                "i18n",
+                "text"
+            ],
+            "time": "2018-12-05T18:34:18+00:00"
+        },
         {
             "name": "twig/twig",
             "version": "v2.6.2",
diff --git a/config/packages/twig_extensions.yaml b/config/packages/twig_extensions.yaml
new file mode 100644
index 00000000..a45911f8
--- /dev/null
+++ b/config/packages/twig_extensions.yaml
@@ -0,0 +1,11 @@
+services:
+    _defaults:
+        public: false
+        autowire: true
+        autoconfigure: true
+
+    # Uncomment any lines below to activate that Twig extension
+    #Twig\Extensions\ArrayExtension: ~
+    #Twig\Extensions\DateExtension: ~
+    Twig\Extensions\IntlExtension: ~
+    #Twig\Extensions\TextExtension: ~
diff --git a/symfony.lock b/symfony.lock
index e31d6311..6a2ab329 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -500,6 +500,18 @@
     "symfony/yaml": {
         "version": "v4.2.3"
     },
+    "twig/extensions": {
+        "version": "1.0",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "master",
+            "version": "1.0",
+            "ref": "ddb2e0a77773b7fd75d8d649545f174e664500ab"
+        },
+        "files": [
+            "./config/packages/twig_extensions.yaml"
+        ]
+    },
     "twig/twig": {
         "version": "v2.6.2"
     },
diff --git a/templates/show_part_info.html.twig b/templates/show_part_info.html.twig
index de9835be..a367fd10 100644
--- a/templates/show_part_info.html.twig
+++ b/templates/show_part_info.html.twig
@@ -198,7 +198,7 @@
 
                     <div class="form-group">
                         <label>{% trans %}createdAt{% endtrans %}:</label>
-                        <p>{{ part.addedDate | date}}
+                        <p>{{ part.addedDate | localizeddate("long")}}
                             {#{if !empty($creation_user)} {% trans %}by{% endtrans %}
                             {if $can_visit_user}
                             <a href="{$relative_path}user_info.php?uid={$creation_user_id}">{$creation_user}</a>
@@ -213,7 +213,7 @@
 
                     <div class="form-group">
                         <label>{% trans %}lastModified{% endtrans %}:</label>
-                        <p>{{ part.lastModified | date }}
+                        <p>{{ part.lastModified | localizeddate("long") }}
                             {# {if !empty($last_modified_user)} {% trans %}by{% endtrans %}
                             {if $can_visit_user}
                             <a href="{$relative_path}user_info.php?uid={$last_modified_user_id}">{$last_modified_user}</a>