diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index 98957cde41b6f66bbce10cc4faa1a423a73524b6..19d30f166542ce85a823a3e2a9f0a84943a5873d 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20231209
+20231210
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 48e634c06074bc71409b8bb60db25409e07dae08..1dcd93775475cf475af3c34b82c7cfc0c63c1744 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,30 @@
+2023-12-09  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2023-12-09  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/111826
+	* include/std/format (__cpp_lib_format): Update value.
+	* include/std/version (__cpp_lib_format): Likewise.
+	* testsuite/std/format/functions/format.cc: Update expected
+	value.
+
+2023-12-09  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2023-12-07  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/std/format (_Iter_sink<charT, contiguous_iterator>):
+	Remove uint64_t local type.
+
+2023-12-09  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2023-12-07  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/bits/atomic_wait.h: Include <cstdint> instead of
+	<stdint.h>.
+
 2023-12-06  Jonathan Wakely  <jwakely@redhat.com>
 
 	Backported from master: