diff --git a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
index 03648b0c6ff2..3a13620a8587 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildMozillaMach, callPackage, fetchurl, fetchpatch, nixosTests }:
+{ stdenv, lib, buildMozillaMach, callPackage, fetchurl, fetchpatch, nixosTests, icu, fetchpatch2 }:
 
 rec {
   thunderbird = thunderbird-115;
@@ -75,5 +75,16 @@ rec {
     webrtcSupport = false;
 
     pgoSupport = false; # console.warn: feeds: "downloadFeed: network connection unavailable"
+
+    icu = icu.overrideAttrs (attrs: {
+      # standardize vtzone output
+      # Work around ICU-22132 https://unicode-org.atlassian.net/browse/ICU-22132
+      # https://bugzilla.mozilla.org/show_bug.cgi?id=1790071
+      patches = attrs.patches ++ [(fetchpatch2 {
+        url = "https://hg.mozilla.org/mozilla-central/raw-file/fb8582f80c558000436922fb37572adcd4efeafc/intl/icu-patches/bug-1790071-ICU-22132-standardize-vtzone-output.diff";
+        stripLen = 3;
+        hash = "sha256-MGNnWix+kDNtLuACrrONDNcFxzjlUcLhesxwVZFzPAM=";
+      })];
+    });
   };
 }