diff --git a/res/values-de/strings.xml b/res/values-de/strings.xml
index e572a1855..3e613950b 100644
--- a/res/values-de/strings.xml
+++ b/res/values-de/strings.xml
@@ -14,13 +14,6 @@
   <string name="about_text">GNU General Public License V2\n © 2010-2016 Belledonne Communications</string>
   <string name="about_link">www.linphone.org</string>
   <string name="sync_account_name">Linphone-Kontakte</string>
-  <string name="history_date_format">EEE, t MMM</string>
-  <string name="history_detail_date_format">jjjj/MM/tt - HH:mm - </string>
-  <string name="inapp_popup_date_format">jjjj/MM/tt</string>
-  <string name="inapp_popup_date_day">tt</string>
-  <string name="messages_date_format">tt/MM, HH:mm</string>
-  <string name="messages_list_date_format">tt/MM</string>
-  <string name="today_date_format">HH:mm</string>
   <!--Common-->
   <string name="username">Benutzername</string>
   <string name="phone_number">Telefonnummer</string>
diff --git a/res/values-fi/strings.xml b/res/values-fi/strings.xml
index 3738405b2..2e2ce5996 100644
--- a/res/values-fi/strings.xml
+++ b/res/values-fi/strings.xml
@@ -10,11 +10,6 @@
   <string name="notification_register_failure">Epäonnistui rekisteröidä kohteeseen %s</string>
   <string name="tunnel_host"></string>
   <string name="sync_account_name">linphone yhteystiedot</string>
-  <string name="history_date_format">VVV, p KKK esim. Maanantai, 1 Tam</string>
-  <string name="history_detail_date_format">vvvv/KK/dd - TT:mm - esim 2012/11/22 - 12:34</string>
-  <string name="messages_date_format">pp/KK, TT:mm esim 22/11, 12:34</string>
-  <string name="messages_list_date_format">pp/KK esim 22/11</string>
-  <string name="today_date_format">TT:mm esim. 11:11</string>
   <!--Common-->
   <string name="username">Käyttäjätunnus</string>
   <string name="phone_number">Puhelin numero</string>
diff --git a/res/values-fr/strings.xml b/res/values-fr/strings.xml
index 35eb0b194..8aefc4504 100644
--- a/res/values-fr/strings.xml
+++ b/res/values-fr/strings.xml
@@ -14,13 +14,6 @@
   <string name="about_text">GNU General Public License V2\n © 2010-2016 Belledonne Communications</string>
   <string name="about_link">www.linphone.org</string>
   <string name="sync_account_name">contacts linphone</string>
-  <string name="history_date_format">EEE, d MMM</string>
-  <string name="history_detail_date_format">dd/MM/yyy - HH:mm -</string>
-  <string name="inapp_popup_date_format">yyyy/MM/dd</string>
-  <string name="inapp_popup_date_day">dd</string>
-  <string name="messages_date_format">dd/MM, HH:mm</string>
-  <string name="messages_list_date_format">dd/MM</string>
-  <string name="today_date_format">HH:mm</string>
   <!--Common-->
   <string name="username">Nom d\'utilisateur</string>
   <string name="phone_number">Numéro de téléphone</string>
diff --git a/res/values-ja/strings.xml b/res/values-ja/strings.xml
index 31d4abfb2..42622eb28 100644
--- a/res/values-ja/strings.xml
+++ b/res/values-ja/strings.xml
@@ -14,11 +14,6 @@
   <string name="about_text">GNU ライセンス V2\n © 2010-2016 Belledonne Communications</string>
   <string name="about_link">www.linphone.org</string>
   <string name="sync_account_name">linphoneにたずねる</string>
-  <string name="history_date_format">EEE, d MMM</string>
-  <string name="history_detail_date_format">yyyy/MM/dd - HH:mm - </string>
-  <string name="messages_date_format">dd/MM, HH:mm</string>
-  <string name="messages_list_date_format">dd/MM</string>
-  <string name="today_date_format">HH:mm</string>
   <!--Common-->
   <string name="username">ユーザー名</string>
   <string name="phone_number">電話番号</string>
diff --git a/res/values-pl/strings.xml b/res/values-pl/strings.xml
index f75acd497..396ee4bed 100644
--- a/res/values-pl/strings.xml
+++ b/res/values-pl/strings.xml
@@ -14,11 +14,6 @@
   <string name="about_text">GNU General Public License V2\n © 2010-2016 Belledonne Communications</string>
   <string name="about_link">www.linphone.org</string>
   <string name="sync_account_name">kontakt linphone</string>
-  <string name="history_date_format">EEE, d MMM</string>
-  <string name="history_detail_date_format">yyyy/MM/dd - HH:mm - </string>
-  <string name="messages_date_format">dd/MM, HH:mm</string>
-  <string name="messages_list_date_format">dd/MM</string>
-  <string name="today_date_format">HH:mm</string>
   <!--Common-->
   <string name="username">Nazwa użytkownika</string>
   <string name="phone_number">Numer telefonu</string>
diff --git a/res/values-pt-rBR/strings.xml b/res/values-pt-rBR/strings.xml
index 751d7ea23..74b0187f1 100644
--- a/res/values-pt-rBR/strings.xml
+++ b/res/values-pt-rBR/strings.xml
@@ -14,11 +14,6 @@
   <string name="about_text">GNU General Public License V2\n © 2010-2016 Belledonne Communications</string>
   <string name="about_link">www.linphone.org</string>
   <string name="sync_account_name">Linphone Contatos</string>
-  <string name="history_date_format">EEE, d MMM</string>
-  <string name="history_detail_date_format">dd/MM/yyyy - HH:mm -</string>
-  <string name="messages_date_format">dd/MM, HH:mm</string>
-  <string name="messages_list_date_format">dd/MM</string>
-  <string name="today_date_format">HH:mm</string>
   <!--Common-->
   <string name="username">Usuário</string>
   <string name="phone_number">Número do telefone</string>
diff --git a/res/values-tr/strings.xml b/res/values-tr/strings.xml
index cee7c6892..475c2befc 100644
--- a/res/values-tr/strings.xml
+++ b/res/values-tr/strings.xml
@@ -14,10 +14,6 @@
   <string name="about_text">GNU Genel Kamu Lisansı V2\n © 2010-2016 Belledonne Communications</string>
   <string name="about_link">www.linphone.org</string>
   <string name="sync_account_name">Linphone bağlantıları</string>
-  <string name="history_detail_date_format">yyyy/AA/gg - SS:dd -</string>
-  <string name="messages_date_format">gg/AA, SS:dd</string>
-  <string name="messages_list_date_format">gg/AA</string>
-  <string name="today_date_format">SS:dd</string>
   <!--Common-->
   <string name="username">Kullanıcı adı</string>
   <string name="phone_number">Telefon numarası</string>