Your Nike+ SportBand is automatically set to the current time and date on your computer once you plug the SportBand Link into a USB port.
If you travel across time zones and you want to change the time or date on your SportBand, plug it in to your computer (or any computer running Nike+ Connect). Nike+ Connect will automatically open. Click the Settings button, click on the Time & Date tab in Nike+ Connect and select "Manually set the time and date." Enter the correct time.
You can check the "Use 24-hour time" box to view the time in a 24-hour (military) format.