diff --git a/17 - Classes and Objects/src/App.java b/17 - Classes and Objects/src/App.java
index 68a2568..e7875aa 100644
--- a/17 - Classes and Objects/src/App.java	
+++ b/17 - Classes and Objects/src/App.java	
@@ -3,7 +3,7 @@ class Person {
     // Instance variables (data or "state")
     String name;
     int age;
-     
+    int date_of_birth;
      
     // Classes can contain
      
@@ -21,14 +21,17 @@ public static void main(String[] args) {
         Person person1 = new Person();  
         person1.name = "Joe Bloggs";
         person1.age = 37;
+        person1.date_of_birth = 10311984;
          
         // Create a second Person object
         Person person2 = new Person();
         person2.name = "Sarah Smith";
         person2.age = 20;
+        person2.date_of_birth = 10312002;
          
         System.out.println(person1.name);
+        System.out.println(person1.date_of_birth);
          
     }
  
-}
\ No newline at end of file
+}