diff --git a/conf/config.php b/conf/config.php
index c37e1ca..65d8a00 100755
--- a/conf/config.php
+++ b/conf/config.php
@@ -258,7 +258,7 @@ $config['default_first_day'] = 1;
 | Please, use a valid timezone from http://php.net/timezones
 */
 
-$config['default_timezone'] = 'Europe/Paris';
+$config['default_timezone'] = 'YNH_TIMEZONE';
 
 /*
 |--------------------------------------------------------------------------
diff --git a/scripts/install b/scripts/install
index 8fd4562..d0a9d1b 100644
--- a/scripts/install
+++ b/scripts/install
@@ -62,6 +62,8 @@ logout_redirect="https://$domain/ynhsso"
 sed -i "s@YNH_LOGOUT_REDIRECT_TO@$logout_redirect@g" ../conf/config.php
 lang=$(sudo bash -c "echo $LANG | cut -d '.' -f 1")
 sed -i "s@YNH_LANG@$lang@g" ../conf/config.php
+timezone=$(cat /etc/timezone)
+sed -i "s@YNH_TIMEZONE@$timezone@g" ../conf/config.php
 
 # copy config files
 sudo cp ../conf/{config.php,database.php,caldav.php} $final_path/web/config/
diff --git a/scripts/upgrade b/scripts/upgrade
index a2c4c0e..e51d730 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -44,6 +44,8 @@ logout_redirect="https://$domain/ynhsso"
 sed -i "s@YNH_LOGOUT_REDIRECT_TO@$logout_redirect@g" ../conf/config.php
 lang=$(sudo bash -c "echo $LANG | cut -d '.' -f 1")
 sed -i "s@YNH_LANG@$lang@g" ../conf/config.php
+timezone=$(cat /etc/timezone)
+sed -i "s@YNH_TIMEZONE@$timezone@g" ../conf/config.php
 
 # copy config files
 sudo cp ../conf/{config.php,database.php,caldav.php} $final_path/web/config/