diff --git a/admin/intro.php b/admin/intro.php
index 740d088ed..56228b448 100644
--- a/admin/intro.php
+++ b/admin/intro.php
@@ -172,22 +172,6 @@ SELECT COUNT(*)
   $template->assign('NB_COMMENTS', 0);
 }
 
-if ($nb_photos > 0)
-{
-  $query = '
-SELECT MIN(date_available)
-  FROM '.IMAGES_TABLE.'
-;';
-  list($first_date) = pwg_db_fetch_row(pwg_query($query));
-
-  $template->assign(
-    array(
-      'first_added_date' => format_date($first_date),
-      'first_added_age' => time_since($first_date, 'year', null, false, false),
-      )
-    );
-}
-
 if ($conf['show_piwigo_latest_news'])
 {
   $news = get_piwigo_news(0, 1);
diff --git a/admin/maintenance_env.php b/admin/maintenance_env.php
index f00d7c45b..6689196b3 100644
--- a/admin/maintenance_env.php
+++ b/admin/maintenance_env.php
@@ -344,6 +344,28 @@ else
     );
 }
 
+$query = '
+SELECT
+    registration_date
+  FROM '.USER_INFOS_TABLE.'
+  WHERE user_id = 2
+;';
+$users = query2array($query);
+if (count($users) > 0)
+{
+  $installed_on = $users[0]['registration_date'];
+
+  if (!empty($installed_on))
+  {
+    $template->assign(
+      array(
+        'INSTALLED_ON' => format_date($installed_on, array('day', 'month', 'year')),
+        'INSTALLED_SINCE' => time_since($installed_on, 'day'),
+      )
+    );
+  }
+}
+
 // +-----------------------------------------------------------------------+
 // | Define advanced features                                              |
 // +-----------------------------------------------------------------------+
diff --git a/admin/themes/default/template/intro.tpl b/admin/themes/default/template/intro.tpl
index d12ea5912..d3011997b 100644
--- a/admin/themes/default/template/intro.tpl
+++ b/admin/themes/default/template/intro.tpl
@@ -174,13 +174,6 @@ let str_size = "";
 <span class="number">{$STORAGE_USED}</span><span class="caption">{'Storage used'|translate}</span>
 </div>
 
-{if $NB_PHOTOS > 1}
-<div class="stat-box">
-<i class="icon-back-in-time icon-yellow"></i>
-<span class="number">{$first_added_age}</span><span class="caption" title="{'first photo added on %s'|translate:$first_added_date}">{'First photo added'|translate}</span>
-</div>
-{/if}
-
 </div> {* .stat-boxes *}
 
 <div class="intro-charts">
diff --git a/admin/themes/default/template/maintenance_env.tpl b/admin/themes/default/template/maintenance_env.tpl
index 3a1fc664b..2a3e02916 100644
--- a/admin/themes/default/template/maintenance_env.tpl
+++ b/admin/themes/default/template/maintenance_env.tpl
@@ -13,6 +13,9 @@ const unit_MB = "{"%s MB"|@translate}"
   <legend><span class="icon-television icon-red"></span> {'Environment'|@translate}</legend>
   <ul style="font-weight:bold">
     <li><a href="{$PHPWG_URL}" class="externalLink">Piwigo</a> {$PWG_VERSION} <a href="{$U_CHECK_UPGRADE}&tab=env" class="icon-arrows-cw">{'Check for upgrade'|@translate}</a></li>
+{if isset($INSTALLED_ON)}
+    <li>{'Installed on %s, %s'|translate:$INSTALLED_ON:$INSTALLED_SINCE}</li>
+{/if}
     <li>{'Operating system'|@translate}: {$OS}</li>
     <li>PHP: {$PHP_VERSION} (<a href="{$U_PHPINFO}" class="externalLink">{'Show info'|@translate}</a>)  [{$PHP_DATATIME}]</li>
     <li>{$DB_ENGINE}: {$DB_VERSION} [{$DB_DATATIME}]</li>
diff --git a/language/en_UK/admin.lang.php b/language/en_UK/admin.lang.php
index 451963581..d84e1deac 100644
--- a/language/en_UK/admin.lang.php
+++ b/language/en_UK/admin.lang.php
@@ -333,7 +333,6 @@ $lang['File upload stopped by extension'] = 'File upload stopped by extension';
 $lang['File'] = "File";
 $lang['File/directory read error'] = "File/directory read error";
 $lang['Find a new representant by random'] = "Find a new random album thumbnail";
-$lang['first photo added on %s'] = "first photo added on %s";
 $lang['Follow Orientation'] = 'Follow Orientation';
 $lang['Following plugins may not be compatible with the new version of Piwigo:'] = 'Following plugins may not be compatible with the new version of Piwigo:';
 $lang['Following themes may not be compatible with the new version of Piwigo:'] = 'Following themes may not be compatible with the new version of Piwigo:';
@@ -988,7 +987,6 @@ $lang['Dashboard'] = 'Dashboard';
 $lang['%sGB'] = '%s GB';
 $lang['%sMB'] = '%s MB';
 $lang['Storage used'] = 'Storage used';
-$lang['First photo added'] = 'First photo added';
 $lang['No filter on album. Select one or type to search'] = 'No filter on album. Select one or type to search';
 $lang['Piwigo Remote Sync is able to upload a whole folder hierarchy. If you run it again, only new photos will be uploaded.'] = 'Piwigo Remote Sync is able to upload a whole folder hierarchy. If you run it again, only new photos will be uploaded.';
 $lang['Share / Send your photos directly from your Mac Os X (10.10 and following) to Piwigo'] = 'Share / Send your photos directly from your macOS (10.10 and later) to Piwigo';
@@ -1316,4 +1314,5 @@ $lang['and %d more'] = 'and %d more';
 $lang['Picture to associate formats with'] = 'Picture to associate formats with';
 $lang['The original picture will be detected with the filename (without extension).'] = 'The original picture will be detected with the filename (without extension).';
 $lang['Delete %s format ?'] = 'Delete %s format ?';
+$lang['Installed on %s, %s'] = 'Installed on %s, %s';
 // Leave this line empty
diff --git a/language/fr_FR/admin.lang.php b/language/fr_FR/admin.lang.php
index aab7172c8..fb4e75313 100644
--- a/language/fr_FR/admin.lang.php
+++ b/language/fr_FR/admin.lang.php
@@ -1316,4 +1316,5 @@ $lang['and %d more'] = 'et %d autre(s)';
 $lang['Picture to associate formats with'] = 'Photo à associer avec les formats';
 $lang['The original picture will be detected with the filename (without extension).'] = 'La photo originale sera détectée en comparant les noms des fichiers (sans extension).';
 $lang['Delete %s format ?'] = 'Supprimer le format %s ?';
+$lang['Installed on %s, %s'] = 'Installé le %s, %s';
 // Leave this line empty