Sunset Clock Of Europe by Oliver Najmann

This is a chart about time data of European capitals. It visualizes differences in local sunset times and length of day using a clock chart rather than a map.
Selected European capitals are arranged around the clock according to their local sunset times at the summer solstice and the winter solstice, also showing the length of the day and the time zone in a compact style.
Estimating the sunset times (and the length of day) of foreign towns is not always easy because of the underlying mathematics of longitude, latitude and time zones. This chart reveals some surprising facts.