Index: Modules/timemodule.c
===================================================================
--- Modules/timemodule.c	(revision 78371)
+++ Modules/timemodule.c	(working copy)
@@ -382,6 +382,43 @@
 	return 1;
 }
 
+
+static PyObject *
+time_timegm(PyObject *self, PyObject *tup)
+{
+    struct tm buf;
+    time_t tt;
+    if (!gettmarg(tup, &buf))
+        return NULL;
+#ifdef HAVE_TIMEGM
+    /* Use timegm function where available */
+    tt = timegm(&buf);
+#elif defined(HAVE_MKTIME) && defined(HAVE_WORKING_TZSET)
+    /* Fallback to mktime, taken from timegm(3)*/
+    char *tz;
+    tz = getenv("TZ");
+    setenv("TZ", "", 1);
+    tzset();
+    tt = mktime(&buf);
+    if (tz)
+        setenv("TZ", "", 1);
+    else
+        unsetenv("TZ");
+    tzset();
+#endif
+    if (tt == (time_t)(-1)) {
+		PyErr_SetString(PyExc_OverflowError,
+				"timegm argument out of range");
+		return NULL;
+	}
+    return PyFloat_FromDouble((double)tt);
+}
+
+PyDoc_STRVAR(timegm_doc,
+"timegm(tuple) -> Floating point number\n\
+\n\
+Convert a UTC tuple to seconds since the Epoch.");
+
 #ifdef HAVE_STRFTIME
 static PyObject *
 time_strftime(PyObject *self, PyObject *args)
@@ -773,6 +810,9 @@
 	{"localtime",	time_localtime, METH_VARARGS, localtime_doc},
 	{"asctime",	time_asctime, METH_VARARGS, asctime_doc},
 	{"ctime",	time_ctime, METH_VARARGS, ctime_doc},
+#ifdef HAVE_TIMEGM || (defined(HAVE_MKTIME) && defined(HAVE_WORKING_TZSET))
+    {"timegm", time_timegm, METH_O, timegm_doc},
+#endif
 #ifdef HAVE_MKTIME
 	{"mktime",	time_mktime, METH_O, mktime_doc},
 #endif
@@ -824,6 +864,7 @@
 clock() -- return CPU time since process start as a float\n\
 sleep() -- delay for a number of seconds given as a float\n\
 gmtime() -- convert seconds since Epoch to UTC tuple\n\
+timegm() - Convert a UTC tuple to seconds since the Epoch.\n\
 localtime() -- convert seconds since Epoch to local time tuple\n\
 asctime() -- convert time tuple to string\n\
 ctime() -- convert time in seconds to string\n\