World Clock Deluxe comes with over 1,600 cities that you can assign to your clocks.
Make World Clock Deluxe active and choose View > Cities & Time Zones.
Click any clock in the palette and choose Cities & Time Zones from the pop-up menu.
Click the World Clock Deluxe status menu icon or clock and choose Cities & Time Zones.
Press and hold the World Clock Deluxe icon in the Dock and choose Cities & Time Zones from the pop-up menu.