diff --git a/conf/locale/locale_de-DE.ini b/conf/locale/locale_de-DE.ini
index 2b9e226f2c..d201a635a1 100755
--- a/conf/locale/locale_de-DE.ini
+++ b/conf/locale/locale_de-DE.ini
@@ -519,7 +519,7 @@ milestones.title=Titel
 milestones.desc=Beschreibung
 milestones.due_date=Fälligkeitsdatum (optional)
 milestones.clear=Bereinigen
-milestones.invalid_due_date_format=Format des Fälligkeitsdatums ist ungültig. Es muss das Format 'Jahr-mm-dd' haben.
+milestones.invalid_due_date_format=Format des Fälligkeitsdatums ist ungültig. Es muss das Format 'jjjj-mm-dd' haben.
 milestones.create_success=Meilenstein '%s' wurde erfolgreich erstellt!
 milestones.edit=Meilenstein bearbeiten
 milestones.edit_subheader=Benutze eine bessere Beschreibung für die Meilensteine, um die Menschen nicht zu verwirren.
diff --git a/conf/locale/locale_en-US.ini b/conf/locale/locale_en-US.ini
index 14d6ca5bbd..b3934327ec 100644
--- a/conf/locale/locale_en-US.ini
+++ b/conf/locale/locale_en-US.ini
@@ -520,7 +520,7 @@ milestones.title = Title
 milestones.desc = Description
 milestones.due_date = Due Date (optional)
 milestones.clear = Clear
-milestones.invalid_due_date_format = Due date format is invalid, must be 'year-mm-dd'.
+milestones.invalid_due_date_format = Due date format is invalid, must be 'yyyy-mm-dd'.
 milestones.create_success = Milestone '%s' has been created successfully!
 milestones.edit = Edit Milestone
 milestones.edit_subheader = Use better description for milestones so people won't be confused.
diff --git a/conf/locale/locale_fr-FR.ini b/conf/locale/locale_fr-FR.ini
index 2327394d71..9d1739b03a 100755
--- a/conf/locale/locale_fr-FR.ini
+++ b/conf/locale/locale_fr-FR.ini
@@ -519,7 +519,7 @@ milestones.title=Titre
 milestones.desc=Description
 milestones.due_date=Date d'échéance (facultatif)
 milestones.clear=Effacer
-milestones.invalid_due_date_format=Le format de la date d'échéance est invalide, il doit être comme suit 'année-mm-jj'.
+milestones.invalid_due_date_format=Le format de la date d'échéance est invalide, il doit être comme suit 'AAAA-mm-jj'.
 milestones.create_success=Le Jalon '%s' a été crée avec succès !
 milestones.edit=Éditer le Jalon
 milestones.edit_subheader=Utilisez une description claire pour les jalons pour ne pas induire les gens en erreur.
diff --git a/conf/locale/locale_it-IT.ini b/conf/locale/locale_it-IT.ini
index 225f867081..50a3194726 100755
--- a/conf/locale/locale_it-IT.ini
+++ b/conf/locale/locale_it-IT.ini
@@ -519,7 +519,7 @@ milestones.title=Title
 milestones.desc=Description
 milestones.due_date=Due Date (optional)
 milestones.clear=Clear
-milestones.invalid_due_date_format=Due date format is invalid, must be 'year-mm-dd'.
+milestones.invalid_due_date_format=Due date format is invalid, must be 'YYYY-mm-dd'.
 milestones.create_success=Milestone '%s' has been created successfully!
 milestones.edit=Edit Milestone
 milestones.edit_subheader=Use better description for milestones so people won't be confused.
diff --git a/conf/locale/locale_ja-JP.ini b/conf/locale/locale_ja-JP.ini
index e12dbdadde..008c4c34d7 100755
--- a/conf/locale/locale_ja-JP.ini
+++ b/conf/locale/locale_ja-JP.ini
@@ -519,7 +519,7 @@ milestones.title=Title
 milestones.desc=Description
 milestones.due_date=Due Date (optional)
 milestones.clear=Clear
-milestones.invalid_due_date_format=Due date format is invalid, must be 'year-mm-dd'.
+milestones.invalid_due_date_format=Due date format is invalid, must be 'yyyy-mm-dd'.
 milestones.create_success=Milestone '%s' has been created successfully!
 milestones.edit=Edit Milestone
 milestones.edit_subheader=Use better description for milestones so people won't be confused.
diff --git a/conf/locale/locale_nl-NL.ini b/conf/locale/locale_nl-NL.ini
index 1a8e11b3fe..02adf561e3 100755
--- a/conf/locale/locale_nl-NL.ini
+++ b/conf/locale/locale_nl-NL.ini
@@ -519,7 +519,7 @@ milestones.title=Titel
 milestones.desc=Beschrijving
 milestones.due_date=Vervaldatum (optioneel)
 milestones.clear=Leegmaken
-milestones.invalid_due_date_format=Formaat vervaldatum is ongeldig, moet zijn "jaar-mm-dd".
+milestones.invalid_due_date_format=Formaat vervaldatum is ongeldig, moet zijn "jjjj-mm-dd".
 milestones.create_success=Mijlpaal '%s' is met succes aangemaakt!
 milestones.edit=Bewerk mijlpaal
 milestones.edit_subheader=Gebruik een goede beschrijving voor mijlpalen, om verwarring te voorkomen.
diff --git a/conf/locale/locale_ru-RU.ini b/conf/locale/locale_ru-RU.ini
index 1238e51fb6..249771167b 100755
--- a/conf/locale/locale_ru-RU.ini
+++ b/conf/locale/locale_ru-RU.ini
@@ -519,7 +519,7 @@ milestones.title=Title
 milestones.desc=Description
 milestones.due_date=Due Date (optional)
 milestones.clear=Clear
-milestones.invalid_due_date_format=Due date format is invalid, must be 'year-mm-dd'.
+milestones.invalid_due_date_format=Due date format is invalid, must be 'yyyy-mm-dd'.
 milestones.create_success=Milestone '%s' has been created successfully!
 milestones.edit=Edit Milestone
 milestones.edit_subheader=Use better description for milestones so people won't be confused.
diff --git a/conf/locale/locale_zh-CN.ini b/conf/locale/locale_zh-CN.ini
index 8abd9fcaff..932854c8f9 100755
--- a/conf/locale/locale_zh-CN.ini
+++ b/conf/locale/locale_zh-CN.ini
@@ -519,7 +519,7 @@ milestones.title=标题
 milestones.desc=描述
 milestones.due_date=截止日期（可选）
 milestones.clear=清除
-milestones.invalid_due_date_format=截止日期的格式错误，必须是 'year-mm-dd' 的形式。
+milestones.invalid_due_date_format=截止日期的格式错误，必须是 'yyyy-mm-dd' 的形式。
 milestones.create_success=里程碑 '%s' 创建成功！
 milestones.edit=编辑里程碑
 milestones.edit_subheader=使用更加清晰的描述来帮助人们更好地理解里程碑的作用。
diff --git a/conf/locale/locale_zh-HK.ini b/conf/locale/locale_zh-HK.ini
index c01b8792ec..95f4f80371 100755
--- a/conf/locale/locale_zh-HK.ini
+++ b/conf/locale/locale_zh-HK.ini
@@ -519,7 +519,7 @@ milestones.title=標題
 milestones.desc=描述
 milestones.due_date=截止日期（可選）
 milestones.clear=清除
-milestones.invalid_due_date_format=截止日期的格式錯誤，必須是 'year-mm-dd' 的形式。
+milestones.invalid_due_date_format=截止日期的格式錯誤，必須是 'yyyy-mm-dd' 的形式。
 milestones.create_success=里程碑 '%s' 創建成功！
 milestones.edit=編輯里程碑
 milestones.edit_subheader=使用更加清晰的描述來幫助人們更好地理解里程碑的作用。