Patch #1490224: set time.altzone correctly on Cygwin.
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
index f089ecd..742d6bf 100644
--- a/Modules/timemodule.c
+++ b/Modules/timemodule.c
@@ -713,7 +713,7 @@
#ifdef __CYGWIN__
tzset();
PyModule_AddIntConstant(m, "timezone", _timezone);
- PyModule_AddIntConstant(m, "altzone", _timezone);
+ PyModule_AddIntConstant(m, "altzone", _timezone-3600);
PyModule_AddIntConstant(m, "daylight", _daylight);
PyModule_AddObject(m, "tzname",
Py_BuildValue("(zz)", _tzname[0], _tzname[1]));