diff --git a/packages/block-library/src/comment-date/block.json b/packages/block-library/src/comment-date/block.json
index ddc0281e6c668c..1e8110f836d93b 100644
--- a/packages/block-library/src/comment-date/block.json
+++ b/packages/block-library/src/comment-date/block.json
@@ -47,6 +47,19 @@
 		},
 		"interactivity": {
 			"clientNavigation": true
+		},
+		"__experimentalBorder": {
+			"radius": true,
+			"color": true,
+			"width": true,
+			"style": true,
+			"__experimentalDefaultControls": {
+				"radius": true,
+				"color": true,
+				"width": true,
+				"style": true
+			}
 		}
-	}
+	},
+	"style": "wp-block-comment-date"
 }
diff --git a/packages/block-library/src/comment-date/style.scss b/packages/block-library/src/comment-date/style.scss
new file mode 100644
index 00000000000000..9b897defa655b7
--- /dev/null
+++ b/packages/block-library/src/comment-date/style.scss
@@ -0,0 +1,4 @@
+.wp-block-comment-date {
+	// This block has customizable padding, border-box makes that more predictable.
+	box-sizing: border-box;
+}
diff --git a/packages/block-library/src/style.scss b/packages/block-library/src/style.scss
index 8f17cd7a50f55c..df1337d7eb25c0 100644
--- a/packages/block-library/src/style.scss
+++ b/packages/block-library/src/style.scss
@@ -10,6 +10,7 @@
 @import "./comments/style.scss";
 @import "./comments-pagination/style.scss";
 @import "./comment-template/style.scss";
+@import "./comment-date/style.scss";
 @import "./cover/style.scss";
 @import "./details/style.scss";
 @import "./embed/style.scss";