This is a homebrew tool I made for the Wii a while ago. It updates the current system time with the real world time via worldtimeapi.org. The code isn't very good, I didn't initially think I would ever release it.
You need devkitPPC (with libogc) installed. Simply run 'make'.
All source code in this repository is licensed under the MIT License, unless specifically stated otherwise in the file header. The full license can be found in the LICENSE file.