This patch allows the player to change the real-time clock while in the Pokegears clock menu.
Simply press up to advance and down to turn back the time.
Holding the A button allows you to change it faster.

Patch to "Pokemon - Silver Version (USA, Europe) (SGB Enhanced).gbc"
MD5	2ac166169354e84d0e2d7cf4cb40b312
SHA-1	49b163f7e57702bc939d642a18f591de55d92dae
SHA-256	72b190859a59623cbef6c49d601f8de52c1d2331b4f08a8d2acc17274fc19a8c