(assuming it would work with the clock port on a KickFlash or X-Surf)
It wont be at the same address as the A1200 so would require some rather custom software to load the time.
On the A2000/A500 you can add a clockport at the correct address by lifting a sticking a little board with an address decoder and clockport header on but I dont know of one for the A4000. :-(
