diff --git a/src/components/CalendarMonth.jsx b/src/components/CalendarMonth.jsx
index 0c9002fbf..5a807c976 100644
--- a/src/components/CalendarMonth.jsx
+++ b/src/components/CalendarMonth.jsx
@@ -203,7 +203,7 @@ class CalendarMonth extends React.PureComponent {
               isVisible,
             })
           ) : (
-            <strong>
+            <strong aria-live="polite">
               {monthTitle}
             </strong>
           )}