diff --git a/README.md b/README.md
index 62d806e8d6e89a1aaad0e8389271de2c2928f1e9..2d4bfae6f63a51d3ebce54972af09460565daac5 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 ## 目前已布置的实验
 
 * [lab1](./Documentations/1-parser/)
-  + DDL：2022-10-03 23:59:59 (UTC+8)
+  + DDL：2022-09-30 23:59:59 (UTC+8)
 
 ## FAQ: How to merge upstream remote branches