diff -r c2217813dbab Lib/test/test_time.py
--- a/Lib/test/test_time.py	Fri Feb 23 12:05:41 2007 +0100
+++ b/Lib/test/test_time.py	Thu Mar 08 01:20:39 2007 +0100
@@ -202,6 +202,17 @@ class TimeTestCase(unittest.TestCase):
         t1 = time.mktime(time.localtime(None))
         self.assert_(0 <= (t1-t0) < 0.2)
 
+    def test_localtime_timezone(self):
+        lt = time.localtime()
+        self.assert_(hasattr(lt, "tm_gmtoff"))
+        t = time.mktime(lt); t9 = time.mktime(lt[:9])
+        self.assert_(t == t9)
+        new_lt = time.localtime(t); new_lt9 = time.localtime(t9)
+        self.assert_(new_lt == lt)
+        self.assert_(new_lt.tm_gmtoff == lt.tm_gmtoff)
+        self.assert_(new_lt9 == lt)
+        self.assert_(new_lt9.tm_gmtoff == lt.tm_gmtoff)
+
 def test_main():
     test_support.run_unittest(TimeTestCase)
 
diff -r c2217813dbab Modules/timemodule.c
--- a/Modules/timemodule.c	Fri Feb 23 12:05:41 2007 +0100
+++ b/Modules/timemodule.c	Thu Mar 08 01:20:39 2007 +0100
@@ -231,6 +231,7 @@ static PyStructSequence_Field struct_tim
 	{"tm_wday", NULL},
 	{"tm_yday", NULL},
 	{"tm_isdst", NULL},
+	{"tm_gmtoff", NULL},
 	{0}
 };
 
@@ -261,6 +262,12 @@ tmtotuple(struct tm *p)
 	SET(6, (p->tm_wday + 6) % 7); /* Want Monday == 0 */
 	SET(7, p->tm_yday + 1);	   /* Want January, 1 == 1 */
 	SET(8, p->tm_isdst);
+#ifdef HAVE_STRUCT_TM_TM_ZONE
+	SET(9, p->tm_gmtoff);
+#else
+	PyStructSequence_SET_ITEM(v, 9, Py_None);
+	Py_INCREF(Py_None);
+#endif
 #undef SET
 	if (PyErr_Occurred()) {
 		Py_XDECREF(v);
@@ -341,7 +348,13 @@ PyDoc_STRVAR(localtime_doc,
 "localtime([seconds]) -> (tm_year,tm_mon,tm_day,tm_hour,tm_min,tm_sec,tm_wday,tm_yday,tm_isdst)\n\
 \n\
 Convert seconds since the Epoch to a time tuple expressing local time.\n\
-When 'seconds' is not passed in, convert the current time instead.");
+When 'seconds' is not passed in, convert the current time instead.\n\
+\n\
+If time zone information is available, the tm_gmtoff attribute may be\n\
+consulted on the time tuple to obtain the location of the associated\n\
+time zone in seconds east of GMT/UTC; thus the value may be negative\n\
+for time zones west of the prime meridian, for example. Where no time\n\
+zone information is available, tm_gmtoff will be None.");
 
 static int
 gettmarg(PyObject *args, struct tm *p)
@@ -360,6 +373,14 @@ gettmarg(PyObject *args, struct tm *p)
 			 &p->tm_yday,
 			 &p->tm_isdst))
 		return 0;
+#ifdef HAVE_STRUCT_TM_TM_ZONE
+	/* Add GMT/UTC offset where a time structure is provided. */
+	if (PyType_IsSubtype(args->ob_type, &StructTimeType)) {
+		PyObject *gmtoff = ((PyStructSequence *)(args))->ob_item[9];
+		if (gmtoff != Py_None)
+			p->tm_gmtoff = PyInt_AsLong(gmtoff);
+	}
+#endif
 	if (y < 1900) {
 		PyObject *accept = PyDict_GetItemString(moddict,
 							"accept2dyear");