Index: Lib/test/test_time.py
===================================================================
--- Lib/test/test_time.py	(revision 75292)
+++ Lib/test/test_time.py	(working copy)
@@ -213,6 +213,12 @@
         t1 = time.mktime(lt1)
         self.assertTrue(0 <= (t1-t0) < 0.2)
 
+    def test_timegm(self):
+        # test every ten days between min and max timestamp
+        ts_min, ts_max = -68*365*24*60*60, 68*365*24*60*60
+        for ts in range(ts_min, ts_max, 10*24*60*60):
+            self.assertEqual(time.timegm(time.gmtime(ts)), ts)
+
 def test_main():
     test_support.run_unittest(TimeTestCase)
 
Index: Modules/timemodule.c
===================================================================
--- Modules/timemodule.c	(revision 75292)
+++ Modules/timemodule.c	(working copy)
@@ -324,6 +324,26 @@
 GMT).  When 'seconds' is not passed in, convert the current time instead.");
 
 static PyObject *
+time_timegm(PyObject *self, PyObject *args)
+{
+	PyObject *calendar_module = PyImport_ImportModuleNoBlock("calendar");
+	PyObject *timegm_result;
+
+	if (!calendar_module)
+		return NULL;
+
+	timegm_result = PyObject_CallMethod(calendar_module,
+						"timegm", "O", args);
+	Py_DECREF(calendar_module);
+	return timegm_result;
+}
+
+PyDoc_STRVAR(timegm_doc,
+"timegm(time tuple) -> seconds\n\
+\n\
+Convert a time tuple expressing UTC (a.k.a. GMT) to seconds since the Epoch.");
+
+static PyObject *
 time_localtime(PyObject *self, PyObject *args)
 {
 	double when;
@@ -770,6 +790,7 @@
 #endif
 	{"sleep",	time_sleep, METH_VARARGS, sleep_doc},
 	{"gmtime",	time_gmtime, METH_VARARGS, gmtime_doc},
+	{"timegm",  time_timegm, METH_VARARGS, timegm_doc},
 	{"localtime",	time_localtime, METH_VARARGS, localtime_doc},
 	{"asctime",	time_asctime, METH_VARARGS, asctime_doc},
 	{"ctime",	time_ctime, METH_VARARGS, ctime_doc},
@@ -824,6 +845,7 @@
 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 UTC tuple to seconds since 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\