With World Clock Deluxe you can define multiple clocks and display them in the Clocks palette, in the Dock, and in the menu bar.
Make World Clock Deluxe active and choose View > Clocks.
Click any clock in the palette and choose Clocks from the pop-up menu.
Click the World Clock Deluxe status menu icon or clock and choose Clocks.
Press and hold the World Clock Deluxe icon in the Dock and choose Clocks from the pop-up menu.
Clocks can show the time in over 1,600 cities and 200 time zones and can have different formats and labels.