Today is the M’Illumino di Meno 2011 day organized by Italian Rai2 Caterpillar radio program. The campaign aims to the awaken public attention toward the energy issues by inviting people, companies and public structures (schools and municipalities) to reduce the waste of energy during this day. Many companies and municipalities have adhered to the campaign – the whole list is available here.
NH Hoteles Italia sustains this event by turning off all the facade lights of its Italian Hotels, and switching off unused energy appliances  for the whole day (Source: NH Hoteles and Caterpillar)