Here are two images of Skyclock showing 7 locations in, or recently in, the news. One image shows a 12-hour view, the other shows a 24-hour display. This is an idea that is percolating – having a World Skyclock page at our website with working clocks for areas of interest.
These images show Frankfurt, Madison, Washington D.C., Islamabad, Kabul, Tripoli, and Guangzhou. More about this later.
In addition to the varying twilight conditions, this is an aid to understanding the time zone offset from your own. For example, Tripoli, Libya is +7 hours from the Eastern Time Zone of the United States. In other words, if it is 9am in New York City, it is 4pm in Tripoli.

