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As discussed back on Section 1.4.4, all iPods (except the screenless Shuffle) have built-in clocks with a simple alarm feature. But that's so last week. The iPod Nano and video iPod let you use multiple clocks, in different time zones and with their own alarms. If you travel frequently, you can simply create a clock for each location instead of constantly fiddling with time zone settings.
The iPod should already have one clock—the one you created when you first set it up and selected your time zone (Section 1.4.4). To add more, go to Extras → Clock → New Clock (it's always at the bottom of the list), and press the center button to select New Clock. On the next screen, select a world region, like North America, Europe, Africa, or Asia. Some categories on the Region menu are less obvious: Select Atlantic if you live in Iceland or the Azores; choose Pacific if you live in Hawaii, Guam, or Pago Pago.