diff --git a/learnclj.clj b/learnclj.clj
index 88a4447..0bb4f39 100644
--- a/learnclj.clj
+++ b/learnclj.clj
@@ -241,16 +241,17 @@ nil          ; => nil (Null/Nothing)
   (format-for-display [this]
     (str "[Date] " (.toString this)))
 
-  java.util.Calendar
+  java.time.LocalDateTime
   (format-for-display [this]
-    (str "[Calendar] " (.getTime this)))
+    (str "[LocalDateTime] " (.toString this)))
 
   java.util.UUID
   (format-for-display [this]
     (str "[UUID] " (.toString this))))
 
-(format-for-display (java.util.Date.))       ; => "[Date] ..."
+(format-for-display (java.util.Date.))        ; => "[Date] ..."
 (format-for-display (java.util.UUID/randomUUID)) ; => "[UUID] ..."
+(format-for-display (java.time.LocalDateTime/now)) ; => "[LocalDateTime] ..."
 
 ;; --- 13. Atoms & State ---