Skycatcher Wallpaper. A monumental wallpaper made from 88 thousand images of the sky above Amsterdam (taken from Luna Maurer’s sky-catcher project), created by Jonathan Puckey and Luna Maurer at the Museum De Paviljoens, 2007. Each vertical strip is exactly one day and contains 144 images and you can see the duration of the days change by the size of the blue bar (daytime).
You can see DST too (although it looks like time is running from top to bottom, rather than bottom to top).
See also: the Ken Murphy’s History of the Sky project for San Francisco’s Exploratorium (previously).