diff --git a/ChangeLog b/ChangeLog
index 18e96d57eac..0ea92062cd8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2023-12-30  Joseph Myers  <jsm@polyomino.org.uk>
+
+	* MAINTAINERS: Update my email address.
+
 2023-12-14  Pierre-Emmanuel Patry  <pierre-emmanuel.patry@embecosm.com>
 	    Thomas Schwinge  <thomas@codesourcery.com>
 
diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index be4676c0042..d3a1eb5640c 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20231230
+20231231
diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index a899b0d5d03..217a04af50b 100644
--- a/gcc/c/ChangeLog
+++ b/gcc/c/ChangeLog
@@ -1,3 +1,7 @@
+2023-12-30  Martin Uecker  <uecker@tugraz.at>
+
+	* c-typeck.cc (tagged_types_tu_compatible_p): Revise.
+
 2023-12-22  Martin Uecker  <uecker@tugraz.at>
 
 	* c-typeck.cc (composite_type_internal): Adapted from
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 6cfc025725d..6b2f90853af 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2023-12-30  Martin Uecker  <uecker@tugraz.at>
+
+	* gcc.dg/c23-tag-9.c: New test.
+
 2023-12-29  Tamar Christina  <tamar.christina@arm.com>
 
 	PR target/110625