AndroidGlobalTime has been added to the apps-for-android project. It is a 3D world clock open source application developed by an engineer at Google. It's intended to serve as an illustrative of how to use the OpenGL ES APIs in your Android Applications.
Just a quick word on how to use AndroidGlobalTime. When you launch it, you'll see a spinning globe showing day and night regions. Pressing the space bar will overlay an analog clock with the time corresponding to location you're currently examining. The arrow keys allow you to spin the Earth and traverse through different time-zones while the clock is displayed. Pressing the center key in the emulator toggles between a 3D and 2D view of the earth. Pressing the L key will turn the city lights on or off. You can also zoom-out by pressing 2 and zoom-in by pressing 8. - Megha Josh
Enjoy!