diff --git a/gnu/local.mk b/gnu/local.mk
index 631b901b8a..c481aa153a 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -13,7 +13,7 @@
 # Copyright © 2016-2023 Efraim Flashner <efraim@flashner.co.il>
 # Copyright © 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 # Copyright © 2017, 2018, 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
-# Copyright © 2017, 2018 Clément Lassieur <clement@lassieur.org>
+# Copyright © 2017, 2018, 2023 Clément Lassieur <clement@lassieur.org>
 # Copyright © 2017, 2020 Mathieu Othacehe <m.othacehe@gmail.com>
 # Copyright © 2017, 2018, 2019 Gábor Boskovits <boskovits@gmail.com>
 # Copyright © 2018 Amirouche Boubekki <amirouche@hypermove.net>
@@ -1417,6 +1417,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/icecat-use-system-media-libs.patch	\
   %D%/packages/patches/icedtea-7-hotspot-aarch64-use-c++98.patch	\
   %D%/packages/patches/icedtea-7-hotspot-pointer-comparison.patch	\
+  %D%/packages/patches/icu4c-fix-TestHebrewCalendarInTemporalLeapYear.patch	\
   %D%/packages/patches/id3lib-CVE-2007-4460.patch			\
   %D%/packages/patches/id3lib-UTF16-writing-bug.patch			\
   %D%/packages/patches/idris-test-ffi008.patch			\
diff --git a/gnu/packages/gnuzilla.scm b/gnu/packages/gnuzilla.scm
index ac96d7fb1f..a367d7a00f 100644
--- a/gnu/packages/gnuzilla.scm
+++ b/gnu/packages/gnuzilla.scm
@@ -5,7 +5,7 @@
 ;;; Copyright © 2015 Sou Bunnbu <iyzsong@gmail.com>
 ;;; Copyright © 2016, 2017, 2018, 2019, 2021 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2016 Alex Griffin <a@ajgrf.com>
-;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
+;;; Copyright © 2017, 2023 Clément Lassieur <clement@lassieur.org>
 ;;; Copyright © 2017, 2018 Nikita <nikita@n0.is>
 ;;; Copyright © 2017, 2018, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2018, 2020 Ricardo Wurmus <rekado@elephly.net>
@@ -392,7 +392,12 @@ (define icu4c-73-promise
                       "-src.tgz"))
                 (sha256
                  (base32
-                  "0iccpdvc0kvpww5a31k9gjkqigyz016i7v80r9zamd34w4fl6mx4")))))))
+                  "0iccpdvc0kvpww5a31k9gjkqigyz016i7v80r9zamd34w4fl6mx4"))
+                (patches
+                 (cons
+                  (search-patch
+                   "icu4c-fix-TestHebrewCalendarInTemporalLeapYear.patch")
+                  (origin-patches (package-source icu4c)))))))))
 
 ;;;
 ;;; Localization helper procedures.
diff --git a/gnu/packages/patches/icu4c-fix-TestHebrewCalendarInTemporalLeapYear.patch b/gnu/packages/patches/icu4c-fix-TestHebrewCalendarInTemporalLeapYear.patch
new file mode 100644
index 0000000000..5d149d8f28
--- /dev/null
+++ b/gnu/packages/patches/icu4c-fix-TestHebrewCalendarInTemporalLeapYear.patch
@@ -0,0 +1,33 @@
+From b6b3e89231a623441940889b5badd90f74bdce2b Mon Sep 17 00:00:00 2001
+From: Frank Tang <ftang@chromium.org>
+Date: Mon, 18 Sep 2023 20:20:42 -0700
+Subject: [PATCH] ICU-22512 Fix broken TestHebrewCalendarInTemporalLeapYear
+
+Fix broken test mistakenly landed in
+https://github.com/unicode-org/icu/pull/2274
+
+Some important steps were missed in the last landing.
+---
+ icu4c/source/test/intltest/caltest.cpp | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/icu4c/source/test/intltest/caltest.cpp b/icu4c/source/test/intltest/caltest.cpp
+index 9d89f468eef0..18b96f231ba3 100644
+--- a/source/test/intltest/caltest.cpp
++++ b/source/test/intltest/caltest.cpp
+@@ -4028,6 +4028,7 @@ void CalendarTest::TestHebrewCalendarInTemporalLeapYear() {
+     for (gc.set(startYear, UCAL_JANUARY, 1);
+          gc.get(UCAL_YEAR, status) <= stopYear;
+          gc.add(UCAL_DATE, incrementDays, status)) {
++        cal->setTime(gc.getTime(status), status);
+         if (failure(status, "add/get/set/getTime/setTime incorrect")) return;
+ 
+         int32_t cal_year = cal->get(UCAL_EXTENDED_YEAR, status);
+@@ -4036,6 +4037,7 @@ void CalendarTest::TestHebrewCalendarInTemporalLeapYear() {
+             leapTest->set(UCAL_MONTH, 0);
+             leapTest->set(UCAL_DATE, 1);
+             // If 10 months after TISHRI is TAMUZ, then it is a leap year.
++            leapTest->add(UCAL_MONTH, 10, status);
+             hasLeapMonth = leapTest->get(UCAL_MONTH, status) == icu::HebrewCalendar::TAMUZ;
+             yearForHasLeapMonth = cal_year;
+         }