TimeFixer (source) is an application created by Derf that allows you to set the date and time to any value between the 11/15/2001 and 9/17/2036. This bypasses the software limitation of 2025 being the last year that can be set via the Microsoft Dashboard. This app is meant for consoles that are not connected to the internet, as the Microsoft Dashboard and Aurora dashboards will set the time via NTP if connected to the internet.
The Xbox 360's Real Time Clock (RTC) uses the same code as the original Xbox. The SMC maintains a 40-bit count of milliseconds since the Xbox epoch (11-15-2001 00:00:00 UTC), represented in hex, with the least significant byte being the first. Once the value reaches FFFFFFFFFF (09/17/2036 19:53:47 UTC), it wraps back around to the epoch and starts the count over.
Controls
- Use
/
or 
/
to select a field. - Use
/
or Left Analog stick to quickly change the value of the field. - Use
/
to precisely change the value of the field. - Press
to save the chosen time. - Press
to reboot the Xbox 360. This must be done for the saved changes to take effect outside of the app.