New translations calendar.json (Greek)

public/locales/el/modules/calendar.json

@@ -12,7 +12,10 @@
       },
       "radarrReleaseType": {
         "label": "Τύπος κυκλοφορίας Radarr"
+      },
+      "hideWeekDays": {
+        "label": ""
       }
     }
   }
-}
+}