To change the date and time on your Nike+ SportWatch GPS:
The next time you plug your SportWatch into your computer, Nike+ Connect settings will default to "Manually set the time and date selected". If you prefer to have your device automatically match the date and time on your computer, change the setting to "Set the time and date to this computer's settings".
You can also change the SportWatch time and date through Nike+ Connect. Plug in your device to the computer and select the "Time & Date" tab within Nike+ Connect. You can set the time and date to match the computer's settings or change manually.