Night of the night?

Tonight is the "Night of the Night".
Meaning of that is to enjoy the darkness without being disturbed by light coming from everywhere.
When there's no light around one can enjoy looking at the stars more; for the animals (and also for man) it's better to keep the night as dark as possible.
Many people and companies are participating in this event by switching off not necesessary light.
Well; I looked at the newbuilding sites of RWE/Essent and Nuon and you can see how much they are doing with it...
Normally our company does something about it too by switching off lights at the parking lot but I think the guardsman could not find the switch....

Tonight the clock goes back one hour so we have to work one hour more....

Here in LARGE...

Here is some information about the event (only in Dutch I'm afraid).