diff --git a/version.h b/version.h
index 0f37481549..22e4bdfb83 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.1"
-#define RUBY_RELEASE_DATE "2009-01-26"
+#define RUBY_RELEASE_DATE "2009-01-27"
 #define RUBY_PATCHLEVEL 5000
 #define RUBY_BRANCH_NAME "trunk"
 
@@ -8,7 +8,7 @@
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_YEAR 2009
 #define RUBY_RELEASE_MONTH 1
-#define RUBY_RELEASE_DAY 26
+#define RUBY_RELEASE_DAY 27
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];