From: Isuru Fernando <isuruf@gmail.com>
Date: Wed, 6 Aug 2025 22:05:41 +0000 (-0500)
Subject: gh-84683: Check `<prefix>/share/zoneinfo` for zoneinfo files on Windows (GH-28495)
X-Git-Tag: v3.15.0a1~755
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=3000594e929aea768fe0dd2437e0722ecfa2dbdc;p=thirdparty%2FPython%2Fcpython.git

gh-84683: Check `<prefix>/share/zoneinfo` for zoneinfo files on Windows (GH-28495)
---

diff --git a/Lib/sysconfig/__init__.py b/Lib/sysconfig/__init__.py
index 49e0986517ce..c583b74ce54f 100644
--- a/Lib/sysconfig/__init__.py
+++ b/Lib/sysconfig/__init__.py
@@ -412,7 +412,13 @@ def _init_non_posix(vars):
     vars['EXE'] = '.exe'
     vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT
     vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))
-    vars['TZPATH'] = ''
+    # No standard path exists on Windows for this, but we'll check
+    # whether someone is imitating a POSIX-like layout
+    check_tzpath = os.path.join(vars['prefix'], 'share', 'zoneinfo')
+    if os.path.exists(check_tzpath):
+        vars['TZPATH'] = check_tzpath
+    else:
+        vars['TZPATH'] = ''
 
 #
 # public APIs
diff --git a/Misc/NEWS.d/next/Library/2021-09-21-17-17-29.gh-issue-84683.wDSRsG.rst b/Misc/NEWS.d/next/Library/2021-09-21-17-17-29.gh-issue-84683.wDSRsG.rst
new file mode 100644
index 000000000000..66f76bda6ad7
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2021-09-21-17-17-29.gh-issue-84683.wDSRsG.rst
@@ -0,0 +1 @@
+:mod:`zoneinfo`: Check in ``<prefix>/share/zoneinfo`` for data files on Windows