diff --git a/src/material/datepicker/calendar-body.scss b/src/material/datepicker/calendar-body.scss
index 41ad2fea2e9b..d0e622715f0e 100644
--- a/src/material/datepicker/calendar-body.scss
+++ b/src/material/datepicker/calendar-body.scss
@@ -261,6 +261,10 @@ $fallbacks: m3-datepicker.get-tokens();
     position: absolute;
   }
 
+  &::before {
+    border-radius: 50%;
+  }
+
   @include cdk.high-contrast {
     border: none;
   }