Tech-Pro World Clock

  World Clock is a desktop clock for Windows that makes an attractive feature on your desktop. It shows the time and date, plus the local time in selected cities, overlaid on a world map shaded to show day, night and twilight areas. You can choose different map views, to suit your needs and location.
There's a pop up calendar showing a year at a glance. An atomic clock update component synchronizes your system clock with an Internet time server.