diff --git a/version.h b/version.h
index 9d312ecc5e..df210e2628 100644
--- a/version.h
+++ b/version.h
@@ -1,11 +1,11 @@
 #define RUBY_VERSION "2.3.0"
-#define RUBY_RELEASE_DATE "2014-12-31"
+#define RUBY_RELEASE_DATE "2015-01-01"
 #define RUBY_PATCHLEVEL -1
 #define RUBY_BRANCH_NAME "trunk"
 
-#define RUBY_RELEASE_YEAR 2014
-#define RUBY_RELEASE_MONTH 12
-#define RUBY_RELEASE_DAY 31
+#define RUBY_RELEASE_YEAR 2015
+#define RUBY_RELEASE_MONTH 1
+#define RUBY_RELEASE_DAY 1
 
 #include "ruby/version.h"