diff --git a/README.md b/README.md
index 66b670b5..d1987f80 100644
--- a/README.md
+++ b/README.md
@@ -179,7 +179,7 @@ Use UTF-16 (but UTF-16 is not supported in GNU windres).
     - Improved the filename when extracting.
     - Strengthened EGA.
     - Improved Russian translation.
-- v.5.3.8 (2020.XX.YY)
+- v.5.3.8 (2020.05.22)
     - Added "Open EGA Manual" item to "Automation" menu.
     - Strictly controlled the file change flag.
 
diff --git a/README.txt b/README.txt
index bd61c1b7..735e7ea9 100644
--- a/README.txt
+++ b/README.txt
@@ -177,7 +177,7 @@ Question 5. Why did I get garbled characters when compiling with Visual Studio?
     - Improved the filename when extracting.
     - Strengthened EGA.
     - Improved Russian translation.
-- v.5.3.8 (2020.XX.YY)
+- v.5.3.8 (2020.05.22)
     - Added "Open EGA Manual" item to "Automation" menu.
     - Strictly controlled the file change flag.
 
diff --git a/READMEIT.txt b/READMEIT.txt
index 6409893f..f9be386f 100644
--- a/READMEIT.txt
+++ b/READMEIT.txt
@@ -175,7 +175,7 @@ Domanda 5. Perchè ottengo caratteri confusi quando compilo con Visual Studio?
   Migliorata gestione nome file durante estrazione.
   Rafforzato EGA.
   Migliorata traduzione lingua russa.
-- v.5.3.8 (YY.XX.2020)
+- v.5.3.8 (22.05.2020)
     Added "Open EGA Manual" item to "Automation" menu.
     Strictly controlled the file change flag.
 
diff --git a/READMEJP.txt b/READMEJP.txt
index 0bdaaa65..89bb6bfc 100644
--- a/READMEJP.txt
+++ b/READMEJP.txt
@@ -493,7 +493,7 @@
         抽出時のファイル名を改良。
         EGA を強化。
         ロシア語翻訳を改良。
-    v.5.3.8 (2020.XX.YY)
+    v.5.3.8 (2020.05.22)
         「自動化」メニューに「EGA マニュアルを開く」項目を追加。
         ファイル変更フラグを厳密に制御。