diff --git a/includes/config.example.php b/includes/config.example.php
index 94e1192..6c65602 100755
--- a/includes/config.example.php
+++ b/includes/config.example.php
@@ -3,6 +3,8 @@
 ini_set('display_errors', 1);
 ini_set('display_startup_errors', 1);
 error_reporting(E_ALL);
+locale_set_default("fr_FR");
+date_default_timezone_set("UTC"); // Default tz for date manipulation is UTC. Display tz is in session.php
 
 
 /*****
diff --git a/includes/session.php b/includes/session.php
index 137110a..73929f1 100755
--- a/includes/session.php
+++ b/includes/session.php
@@ -15,14 +15,14 @@ if(isset($_SESSION['userid'])) {
 	}
 	else {
 		session_destroy();
-		$config['locale'] = locale_get_default();
-		$config['timezone'] = date_default_timezone_get();
+		$config['locale'] = "fr_FR";
+		$config['timezone'] = "Europe/Paris";
 		$user->rank = "visitor"; // All users are visitors
 	}
 }
 else {
-	$config['locale'] = locale_get_default();
-	$config['timezone'] = date_default_timezone_get();
+	$config['locale'] = "fr_FR";
+	$config['timezone'] = "Europe/Paris";
 	$user->rank = "visitor"; // All users are visitors
 }
 
diff --git a/views/d.blog.list.html b/views/d.blog.list.html
index ebfdeeb..0dc2cb1 100755
--- a/views/d.blog.list.html
+++ b/views/d.blog.list.html
@@ -27,7 +27,7 @@
 						<p class="article_legend">
 							<a class="article_link" href="<?=$config['rel_root_folder']?>blog/<?=$row->permalink?>">Lire la suite...</a>
 							<span class="article_infos">
-								Le <? echo datefmt_format($user->date_format,strtotime($row->update_date)) ?> par 
+								<? echo datefmt_format($user->date_format,date_create($row->update_date, new DateTimeZone("UTC"))) ?> par 
 								<? if ($user->rankIsHigher("registered")) { ?>
 									<a href="<?=$config['rel_root_folder']?>user/p/<?=$row->author?>"><?=$row->author_name?></a>
 								<? } 
diff --git a/views/d.blog.view.html b/views/d.blog.view.html
index 7bd80c1..6346d9a 100755
--- a/views/d.blog.view.html
+++ b/views/d.blog.view.html
@@ -15,7 +15,7 @@
 						<select id="bloghistory">
 							<? $i = 0;
 							foreach ($blogHistory->objs as $row) { ?>
-								<option <?=$row->version_id==$blogArticle->version_id?'selected':''?> value="<?=$i?>"><?=$row->is_archive=="f"?'&bull; ':''?><? echo datefmt_format($user->datetimeshort_format,strtotime($row->update_date)) ?></option>
+								<option <?=$row->version_id==$blogArticle->version_id?'selected':''?> value="<?=$i?>"><?=$row->is_archive=="f"?'&bull; ':''?><? echo datefmt_format($user->datetimeshort_format,date_create($row->update_date, new DateTimeZone("UTC"))) ?></option>
 							<? $i++;
 							} ?>
 						</select>
@@ -45,7 +45,7 @@
 			else { ?>
 				<?=$blogArticle->author_name?> 
 			<? } ?>
-			le <? echo datefmt_format($user->datetime_format,strtotime($blogArticle->creation_date)) ?></p>
+			le <? echo datefmt_format($user->datetime_format,date_create($blogArticle->creation_date, new DateTimeZone("UTC"))) ?></p>
 
 			<!-- COMMENTS -->
 
@@ -83,7 +83,7 @@
 								<? } else { ?>
 									<?=$comment->author_obj->name?>
 								<? } ?>
-								le <? echo datefmt_format($user->datetime_format,strtotime($comment->update_date)) ?></p>
+								le <? echo datefmt_format($user->datetime_format,date_create($comment->update_date, new DateTimeZone("UTC"))) ?></p>
 								<? if (($user->rankIsHigher("moderator") || $user->id == $comment->author) && $comment->is_public == 't') { ?>
 									<span class="delete_link"><a href="<?=$config['rel_root_folder']?>blog/<?=$blogArticle->permalink?>/delete_comment/<?=$comment->id?>"><i class="fas fa-trash"></i> Effacer le commentaire</a></span>
 								<? } ?>
diff --git a/views/d.user.member_list.html b/views/d.user.member_list.html
index aadd3ab..505a2b8 100755
--- a/views/d.user.member_list.html
+++ b/views/d.user.member_list.html
@@ -45,8 +45,8 @@
 						<a class="username" href="<?=$config['rel_root_folder']?>user/p/<?=$row->id?>"><?=$row->name?></a>
 					</td>
 					<td><?=$row->get_rank()?></td>
-					<td><? echo datefmt_format($user->date_format,strtotime($row->register_date)) ?></td>
-					<td><? echo datefmt_format($user->date_format,strtotime($row->visit_date)) ?></td>
+					<td><? echo datefmt_format($user->date_format,date_create($row->register_date, new DateTimeZone("UTC"))) ?></td>
+					<td><? echo datefmt_format($user->date_format,date_create($row->visit_date, new DateTimeZone("UTC"))) ?></td>
 					<td>
 						<? if ($row->website != "") { ?>
 						<a target="_blank" href="<?=$row->website?>">Site internet <span class="external-link"><i class="fas fa-external-link-alt"></i></span></a>
diff --git a/views/d.user.profile.html b/views/d.user.profile.html
index 718f6ff..1430ef2 100755
--- a/views/d.user.profile.html
+++ b/views/d.user.profile.html
@@ -24,8 +24,8 @@
 						</aside>
 							<div id="description">
 								<p>Langue : <?=$userProfile->get_locale()?></p>
-								<p>Inscrit le <? echo datefmt_format($user->datetime_format,strtotime($userProfile->register_date)) ?></p>
-								<p>Dernière connexion le <? echo datefmt_format($user->datetime_format,strtotime($userProfile->visit_date)) ?></p>
+								<p>Inscrit le <? echo datefmt_format($user->datetime_format,date_create($userProfile->register_date, new DateTimeZone("UTC"))) ?></p>
+								<p>Dernière connexion le <? echo datefmt_format($user->datetime_format,date_create($userProfile->visit_date, new DateTimeZone("UTC"))) ?></p>
 								<p><?=$userProfile->get_rank()?></p>
 								<p>
 									<? if ($userProfile->website != "") { ?>
diff --git a/views/d.wiki.view.html b/views/d.wiki.view.html
index 836eaca..d7385b8 100755
--- a/views/d.wiki.view.html
+++ b/views/d.wiki.view.html
@@ -15,7 +15,7 @@
 						<select id="wikihistory">
 							<? $i = 0;
 							foreach ($wikiHistory->objs as $row) { ?>
-								<option <?=$row->version_id==$wikiPage->version_id?'selected':''?> value="<?=$i?>"><?=$row->is_archive=="f"?'&bull; ':''?><? echo datefmt_format($user->datetimeshort_format,strtotime($row->update_date)) ?></option>
+								<option <?=$row->version_id==$wikiPage->version_id?'selected':''?> value="<?=$i?>"><?=$row->is_archive=="f"?'&bull; ':''?><? echo datefmt_format($user->datetimeshort_format,date_create($row->update_date, new DateTimeZone("UTC"))) ?></option>
 							<? $i++;
 							} ?>
 						</select>
@@ -38,7 +38,7 @@
 				<?=$wikiPage->content_html?>
 			</div>
 
-			<p id="wikiTimestamp">Page mise à jour le <? echo datefmt_format($user->datetime_format,strtotime($wikiPage->update_date)) ?></p>
+			<p id="wikiTimestamp">Page mise à jour le <? echo datefmt_format($user->datetime_format,date_create($wikiPage->update_date, new DateTimeZone("UTC"))) ?></p>
 
 			<div style="clear: both;"> </div>
 		</section>