diff --git a/lib/js/src/compose/types/page-block/calendar/page-block.ts b/lib/js/src/compose/types/page-block/calendar/page-block.ts
index c22241977..24f8c1f93 100644
--- a/lib/js/src/compose/types/page-block/calendar/page-block.ts
+++ b/lib/js/src/compose/types/page-block/calendar/page-block.ts
@@ -71,7 +71,7 @@ export class PageBlockCalendar extends PageBlock {
       {},
       this.options.header,
       o.header,
-      { views: PageBlockCalendar.handleLegacyViews(o.header?.views || []) },
+      { views: PageBlockCalendar.handleLegacyViews(o.header?.views || ['dayGridMonth']) },
     )
 
     this.options.locale = o.locale || 'en-gb'