use zoneinfo instead of pytz

pyproject.toml

@@ -46,7 +46,6 @@ test = [
     "pytest",
     "pytest-cov",
     "pytest-mock",
-    "pytz==2021.1",
     "simplejson==3.*",
 ]
 doc = [

requirements/requirements-tests.txt

@@ -4,5 +4,4 @@ pre-commit
 pytest
 pytest-cov
 pytest-mock
-pytz==2021.1
 simplejson==3.*

tests/test_arrow.py

@@ -6,7 +6,6 @@
 
 import dateutil
 import pytest
-import pytz
 import simplejson as json
 from dateutil import tz
 from dateutil.relativedelta import FR, MO, SA, SU, TH, TU, WE
@@ -57,9 +56,9 @@ def test_init(self):
         assert result._datetime == self.expected
 
     # regression tests for issue #626
-    def test_init_pytz_timezone(self):
+    def test_init_timezone(self):
         result = arrow.Arrow(
-            2013, 2, 2, 12, 30, 45, 999999, tzinfo=pytz.timezone("Europe/Paris")
+            2013, 2, 2, 12, 30, 45, 999999, tzinfo=tz.gettz("Europe/Paris")
         )
         self.expected = datetime(
             2013, 2, 2, 12, 30, 45, 999999, tzinfo=tz.gettz("Europe/Paris")

tests/test_formatter.py

@@ -1,7 +1,9 @@
+try:
+    import zoneinfo
+except ImportError:
+    from backports import zoneinfo
 from datetime import datetime
-
 import pytest
-import pytz
 from dateutil import tz as dateutil_tz
 
 from arrow import (
@@ -124,7 +126,7 @@ def test_timezone(self):
     @pytest.mark.parametrize("full_tz_name", make_full_tz_list())
     def test_timezone_formatter(self, full_tz_name):
         # This test will fail if we use "now" as date as soon as we change from/to DST
-        dt = datetime(1986, 2, 14, tzinfo=pytz.timezone("UTC")).replace(
+        dt = datetime(1986, 2, 14, tzinfo=zoneinfo.ZoneInfo("UTC")).replace(
             tzinfo=dateutil_tz.gettz(full_tz_name)
         )
         abbreviation = dt.tzname()

tests/utils.py

@@ -1,11 +1,14 @@
-import pytz
+try:
+    import zoneinfo
+except ImportError:
+    from backports import zoneinfo
 from dateutil.zoneinfo import get_zonefile_instance
 
 
 def make_full_tz_list():
     dateutil_zones = set(get_zonefile_instance().zones)
-    pytz_zones = set(pytz.all_timezones)
-    return dateutil_zones.union(pytz_zones)
+    zoneinfo_zones = set(zoneinfo.available_timezones())
+    return dateutil_zones.union(zoneinfo_zones)
 
 
 def assert_datetime_equality(dt1, dt2, within=10):