diff --git a/src/panels/calendar/confirm-event-dialog-box.ts b/src/panels/calendar/confirm-event-dialog-box.ts
index d8a6b3fdbc..77819ee774 100644
--- a/src/panels/calendar/confirm-event-dialog-box.ts
+++ b/src/panels/calendar/confirm-event-dialog-box.ts
@@ -31,8 +31,8 @@ class ConfirmEventDialogBox extends LitElement {
     return html`
       <ha-dialog
         open
-        ?scrimClickAction="true"
-        ?escapeKeyAction="true"
+        scrimClickAction
+        escapeKeyAction
         @closed=${this._dialogClosed}
         defaultAction="ignore"
         .heading=${this._params.title}
diff --git a/src/panels/calendar/dialog-calendar-event-editor.ts b/src/panels/calendar/dialog-calendar-event-editor.ts
index b8808ae0c2..5c11f24823 100644
--- a/src/panels/calendar/dialog-calendar-event-editor.ts
+++ b/src/panels/calendar/dialog-calendar-event-editor.ts
@@ -238,7 +238,8 @@ class DialogCalendarEventEditor extends LitElement {
                 ${this.hass.localize("ui.components.calendar.event.add")}
               </mwc-button>
             `
-          : html` <mwc-button
+          : html`
+              <mwc-button
                 slot="primaryAction"
                 @click=${this._saveEvent}
                 .disabled=${this._submitting}
@@ -258,7 +259,8 @@ class DialogCalendarEventEditor extends LitElement {
                       )}
                     </mwc-button>
                   `
-                : ""}`}
+                : ""}
+            `}
       </ha-dialog>
     `;
   }
diff --git a/src/translations/en.json b/src/translations/en.json
index 34f5efdcc2..12db8b0a56 100755
--- a/src/translations/en.json
+++ b/src/translations/en.json
@@ -634,7 +634,7 @@
         "label": "Calendar",
         "my_calendars": "My Calendars",
         "today": "Today",
-        "event_retrieval_error": "Could not retrieve events for calendars: ",
+        "event_retrieval_error": "Could not retrieve events for calendars:",
         "event": {
           "add": "Add Event",
           "delete": "Delete Event",