From 35781045ae751ab53682b82d4f478f130d159aa9 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Wed, 25 Sep 2024 14:47:10 -1000
Subject: [PATCH 1/4] CI/TST: Check for tzset in set_timezone (#59893)

* CI/TST: Check for tzset in set_timezone

* adjust test message

(cherry picked from commit b9488218ae27b70d1669a932ab16e8ce5a257cf0)
---
 pandas/_testing/contexts.py         | 17 +++++++++--------
 pandas/tests/tslibs/test_parsing.py | 10 +++++++---
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/pandas/_testing/contexts.py b/pandas/_testing/contexts.py
index eb6e4a917889a..48616ee134582 100644
--- a/pandas/_testing/contexts.py
+++ b/pandas/_testing/contexts.py
@@ -78,14 +78,15 @@ def set_timezone(tz: str) -> Generator[None, None, None]:
     import time
 
     def setTZ(tz) -> None:
-        if tz is None:
-            try:
-                del os.environ["TZ"]
-            except KeyError:
-                pass
-        else:
-            os.environ["TZ"] = tz
-            time.tzset()
+        if hasattr(time, "tzset"):
+            if tz is None:
+                try:
+                    del os.environ["TZ"]
+                except KeyError:
+                    pass
+            else:
+                os.environ["TZ"] = tz
+                time.tzset()
 
     orig_tz = os.environ.get("TZ")
     setTZ(tz)
diff --git a/pandas/tests/tslibs/test_parsing.py b/pandas/tests/tslibs/test_parsing.py
index d8f23156bd4d4..e528ad644032d 100644
--- a/pandas/tests/tslibs/test_parsing.py
+++ b/pandas/tests/tslibs/test_parsing.py
@@ -31,9 +31,13 @@
 )
 def test_parsing_tzlocal_deprecated():
     # GH#50791
-    msg = (
-        "Parsing 'EST' as tzlocal.*"
-        "Pass the 'tz' keyword or call tz_localize after construction instead"
+    msg = "|".join(
+        [
+            r"Parsing 'EST' as tzlocal \(dependent on system timezone\) "
+            r"is no longer supported\. "
+            "Pass the 'tz' keyword or call tz_localize after construction instead",
+            ".*included an un-recognized timezone",
+        ]
     )
     dtstr = "Jan 15 2004 03:00 EST"
 

From 1e20ec9a48b20b0ee9e498c74bb269df6613d630 Mon Sep 17 00:00:00 2001
From: Joris Van den Bossche <jorisvandenbossche@gmail.com>
Date: Wed, 2 Oct 2024 15:44:37 +0200
Subject: [PATCH 2/4] keep warning message

---
 pandas/tests/tslibs/test_parsing.py | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/pandas/tests/tslibs/test_parsing.py b/pandas/tests/tslibs/test_parsing.py
index e528ad644032d..d8f23156bd4d4 100644
--- a/pandas/tests/tslibs/test_parsing.py
+++ b/pandas/tests/tslibs/test_parsing.py
@@ -31,13 +31,9 @@
 )
 def test_parsing_tzlocal_deprecated():
     # GH#50791
-    msg = "|".join(
-        [
-            r"Parsing 'EST' as tzlocal \(dependent on system timezone\) "
-            r"is no longer supported\. "
-            "Pass the 'tz' keyword or call tz_localize after construction instead",
-            ".*included an un-recognized timezone",
-        ]
+    msg = (
+        "Parsing 'EST' as tzlocal.*"
+        "Pass the 'tz' keyword or call tz_localize after construction instead"
     )
     dtstr = "Jan 15 2004 03:00 EST"
 

From aa5aad857b79a7775928ec942ec1a691c4fb6e12 Mon Sep 17 00:00:00 2001
From: Joris Van den Bossche <jorisvandenbossche@gmail.com>
Date: Wed, 2 Oct 2024 21:33:09 +0200
Subject: [PATCH 3/4] catch broader warning message

---
 pandas/tests/tslibs/test_parsing.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pandas/tests/tslibs/test_parsing.py b/pandas/tests/tslibs/test_parsing.py
index d8f23156bd4d4..2a965610ff0dc 100644
--- a/pandas/tests/tslibs/test_parsing.py
+++ b/pandas/tests/tslibs/test_parsing.py
@@ -34,6 +34,7 @@ def test_parsing_tzlocal_deprecated():
     msg = (
         "Parsing 'EST' as tzlocal.*"
         "Pass the 'tz' keyword or call tz_localize after construction instead"
+        "|Parsed string"
     )
     dtstr = "Jan 15 2004 03:00 EST"
 

From 679100a4b081f90ddb58044897bc33a40d63021d Mon Sep 17 00:00:00 2001
From: Joris Van den Bossche <jorisvandenbossche@gmail.com>
Date: Wed, 2 Oct 2024 22:07:58 +0200
Subject: [PATCH 4/4] skip test on arm

---
 pandas/tests/tslibs/test_parsing.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pandas/tests/tslibs/test_parsing.py b/pandas/tests/tslibs/test_parsing.py
index 2a965610ff0dc..fb05a57056a83 100644
--- a/pandas/tests/tslibs/test_parsing.py
+++ b/pandas/tests/tslibs/test_parsing.py
@@ -17,6 +17,7 @@
 from pandas._libs.tslibs.parsing import parse_datetime_string_with_reso
 from pandas.compat import (
     ISMUSL,
+    is_platform_arm,
     is_platform_windows,
 )
 import pandas.util._test_decorators as td
@@ -26,7 +27,7 @@
 
 
 @pytest.mark.skipif(
-    is_platform_windows() or ISMUSL,
+    is_platform_windows() or ISMUSL or is_platform_arm(),
     reason="TZ setting incorrect on Windows and MUSL Linux",
 )
 def test_parsing_tzlocal_deprecated():
@@ -34,7 +35,6 @@ def test_parsing_tzlocal_deprecated():
     msg = (
         "Parsing 'EST' as tzlocal.*"
         "Pass the 'tz' keyword or call tz_localize after construction instead"
-        "|Parsed string"
     )
     dtstr = "Jan 15 2004 03:00 EST"