datetime escapes the sandbox.  The Windows build is all set.  I leave it
to others to argue about how to build it on other platforms (on Windows
it's in its own DLL).
diff --git a/PCbuild/python20.wse b/PCbuild/python20.wse
index 91ad583..239e6b7 100644
--- a/PCbuild/python20.wse
+++ b/PCbuild/python20.wse
@@ -1740,6 +1740,11 @@
   Flags=0000000000000010
 end
 item: Install File
+  Source=.\datetime.pyd
+  Destination=%MAINDIR%\DLLs\datetime.pyd
+  Flags=0000000000000010
+end
+item: Install File
   Source=.\mmap.pyd
   Destination=%MAINDIR%\DLLs\mmap.pyd
   Flags=0000000000000010
@@ -1827,6 +1832,11 @@
   Flags=0000000000000010
 end
 item: Install File
+  Source=.\datetime.lib
+  Destination=%MAINDIR%\libs\datetime.lib
+  Flags=0000000000000010
+end
+item: Install File
   Source=.\mmap.lib
   Destination=%MAINDIR%\libs\mmap.lib
   Flags=0000000000000010