Gaze upon dawn and dusk simultaneously

There's a frighteningly expensive corporate toy which tracks the movement of the sun across the earth, displaying the moving swath of light on a flattened map of the globe.

Now you can have your own, albeit a less tricksy one, via the World Sunlight webpage. And - bonus! - you can even see where it's raining thanks to the overlay of cloud cover. Funny, there's always seems to be a whopper of a cumulo nimbus over Ireland.