diff --git a/pkgs/development/python-modules/backports-zoneinfo/default.nix b/pkgs/development/python-modules/backports-zoneinfo/default.nix
new file mode 100644
index 00000000000..a9bc0b55955
--- /dev/null
+++ b/pkgs/development/python-modules/backports-zoneinfo/default.nix
@@ -0,0 +1,39 @@
+{ lib, buildPythonPackage, fetchFromGitHub
+, pythonOlder
+, importlib-resources
+, hypothesis
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "backports-zoneinfo";
+  version = "0.2.1";
+
+  src = fetchFromGitHub {
+    owner = "pganssle";
+    repo = "zoneinfo";
+    rev = version;
+    sha256 = "sha256-00xdDOVdDanfsjQTd3yjMN2RFGel4cWRrAA3CvSnl24=";
+  };
+
+  propagatedBuildInputs = lib.optionals (pythonOlder "3.7") [
+    importlib-resources
+  ];
+
+  pythonImportsCheck = [ "backports.zoneinfo" ];
+
+  checkInputs = [
+    hypothesis
+    pytestCheckHook
+  ];
+
+  # unfortunately /etc/zoneinfo doesn't exist in sandbox, and many tests fail
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Backport of the standard library module zoneinfo";
+    homepage = "https://github.com/pganssle/zoneinfo";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ jonringer ];
+  };
+}
diff --git a/pkgs/development/python-modules/exchangelib/default.nix b/pkgs/development/python-modules/exchangelib/default.nix
index 0cccedd54a9..d29da91af29 100644
--- a/pkgs/development/python-modules/exchangelib/default.nix
+++ b/pkgs/development/python-modules/exchangelib/default.nix
@@ -3,7 +3,7 @@
   lxml, tzlocal, python-dateutil, pygments, requests-kerberos,
   defusedxml, cached-property, isodate, requests_ntlm, dnspython,
   psutil, requests-mock, pyyaml,
-  oauthlib, requests_oauthlib,
+  oauthlib, requests_oauthlib, tzdata,
   flake8,
 }:
 
@@ -24,7 +24,7 @@ buildPythonPackage rec {
     flake8
   ];
   propagatedBuildInputs = [
-    lxml tzlocal python-dateutil pygments requests-kerberos
+    lxml tzlocal tzdata python-dateutil pygments requests-kerberos
     defusedxml cached-property isodate requests_ntlm dnspython
     oauthlib requests_oauthlib
   ];
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 08fdc924071..1681942e41d 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -935,6 +935,8 @@ in {
 
   backports_weakref = callPackage ../development/python-modules/backports_weakref { };
 
+  backports-zoneinfo = callPackage ../development/python-modules/backports-zoneinfo { };
+
   bacpypes = callPackage ../development/python-modules/bacpypes { };
 
   banal = callPackage ../development/python-modules/banal { };