diff --git a/codes/typescript/chapter_hashing/array_hash_map.ts b/codes/typescript/chapter_hashing/array_hash_map.ts
index 41a153d6a..7ce7eeb32 100644
--- a/codes/typescript/chapter_hashing/array_hash_map.ts
+++ b/codes/typescript/chapter_hashing/array_hash_map.ts
@@ -1,6 +1,6 @@
 /*
  * File: array_hash_map.ts
- * Created Time: 2022-12-29
+ * Created Time: 2022-12-20
  * Author: Daniel (better.sunjian@gmail.com)
  */
 
diff --git a/codes/typescript/chapter_hashing/hash_map.ts b/codes/typescript/chapter_hashing/hash_map.ts
index a979d9fc1..5e37d5b01 100644
--- a/codes/typescript/chapter_hashing/hash_map.ts
+++ b/codes/typescript/chapter_hashing/hash_map.ts
@@ -1,6 +1,6 @@
 /*
  * File: hash_map.ts
- * Created Time: 2022-12-29
+ * Created Time: 2022-12-20
  * Author: Daniel (better.sunjian@gmail.com)
  */