Index: Lib/xmlrpclib.py
===================================================================
--- Lib/xmlrpclib.py	(revision 62291)
+++ Lib/xmlrpclib.py	(working copy)
@@ -180,6 +180,14 @@
     def _stringify(string):
         return string
 
+# Format datetime in iso8601 format. Prior methods ignored timezone
+# information (Truncates microseconds, adds TZD, changes +00:00 to Z)
+def _iso8601format(dt):
+    if dt.tzinfo:
+        return dt.tzinfo.normalize(dt.replace(microsecond=0)).isoformat() \
+            .replace('+00:00', 'Z')
+    return dt.replace(microsecond=0).isoformat()
+
 __version__ = "1.0.1"
 
 # xmlrpc integer limits
@@ -355,7 +363,7 @@
     def __init__(self, value=0):
         if not isinstance(value, StringType):
             if datetime and isinstance(value, datetime.datetime):
-                self.value = value.strftime("%Y%m%dT%H:%M:%S")
+                self.value = _iso8601format(value)
                 return
             if not isinstance(value, (TupleType, time.struct_time)):
                 if value == 0:
@@ -772,7 +780,7 @@
     if datetime:
         def dump_datetime(self, value, write):
             write("<value><dateTime.iso8601>")
-            write(value.strftime("%Y%m%dT%H:%M:%S"))
+            write(_iso8601format(value))
             write("</dateTime.iso8601></value>\n")
         dispatch[datetime.datetime] = dump_datetime