diff --git a/03_Day/03_booleans_operators_date.md b/03_Day/03_booleans_operators_date.md
index 91989ea..eacc5b8 100644
--- a/03_Day/03_booleans_operators_date.md
+++ b/03_Day/03_booleans_operators_date.md
@@ -189,7 +189,7 @@ console.log(0 === false)        // false, not exactly the same
 console.log(1 == true)          // true, equivalent
 console.log(1 === true)         // false, not exactly the same
 console.log(undefined == null)  // true
-console.log(undefined === null) // true
+console.log(undefined === null) // false
 console.log(NaN == NaN)         // false, not equal
 console.log(NaN === NaN)        // false
 console.log(typeof NaN)         // number