From abe8eb0a3044fd1a23a2a46cc4bb61e4e022b7c0 Mon Sep 17 00:00:00 2001
From: Brett Cannon <bcannon@gmail.com>
Date: Tue, 13 May 2003 20:28:15 +0000
Subject: [PATCH] Call time.tzset (if available) just before calculating
 possible timezones from time.tzname.

---
 Lib/_strptime.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Lib/_strptime.py b/Lib/_strptime.py
index a08a426916..f32acc0e03 100644
--- a/Lib/_strptime.py
+++ b/Lib/_strptime.py
@@ -284,6 +284,10 @@ class LocaleTime(object):
         # Set self.__timezone by using time.tzname.
         #
         # Empty string used for matching when timezone is not used/needed.
+        try:
+            time.tzset()
+        except AttributeError:
+            pass
         time_zones = ["UTC", "GMT"]
         if time.daylight:
             time_zones.extend(time.tzname)
-- 
2.50.1