diff --git a/homeassistant/components/trafikverket_ferry/config_flow.py b/homeassistant/components/trafikverket_ferry/config_flow.py
index 1f5d19118eb..a1f984e5556 100644
--- a/homeassistant/components/trafikverket_ferry/config_flow.py
+++ b/homeassistant/components/trafikverket_ferry/config_flow.py
@@ -32,6 +32,7 @@ DATA_SCHEMA = vol.Schema(
                 options=WEEKDAYS,
                 multiple=True,
                 mode=selector.SelectSelectorMode.DROPDOWN,
+                translation_key=CONF_WEEKDAY,
             )
         ),
     }
diff --git a/homeassistant/components/trafikverket_ferry/strings.json b/homeassistant/components/trafikverket_ferry/strings.json
index 67200eae135..86ce87c92e4 100644
--- a/homeassistant/components/trafikverket_ferry/strings.json
+++ b/homeassistant/components/trafikverket_ferry/strings.json
@@ -26,5 +26,18 @@
         }
       }
     }
+  },
+  "selector": {
+    "weekday": {
+      "options": {
+        "mon": "Monday",
+        "tue": "Tuesday",
+        "wed": "Wednesday",
+        "thu": "Thursday",
+        "fri": "Friday",
+        "sat": "Saturday",
+        "sun": "Sunday"
+      }
+    }
   }
 }
diff --git a/homeassistant/components/trafikverket_ferry/translations/en.json b/homeassistant/components/trafikverket_ferry/translations/en.json
index 651f3476710..60c69427540 100644
--- a/homeassistant/components/trafikverket_ferry/translations/en.json
+++ b/homeassistant/components/trafikverket_ferry/translations/en.json
@@ -26,5 +26,18 @@
                 }
             }
         }
+    },
+    "selector": {
+        "weekday": {
+            "options": {
+                "mon": "Monday",
+                "tue": "Tuesday",
+                "wed": "Wednesday",
+                "thu": "Thursday",
+                "fri": "Friday",
+                "sat": "Saturday",
+                "sun": "Sunday"
+            }
+        }
     }
 }
\ No newline at end of file