Organized by UNESCO, the International Day of Light (IDL) is a global initiative for the continued appreciation of light and the role it plays in science, culture and art, education, and sustainable development. Light enables a vast amount of our modern technology, in fields as diverse as medicine, communications, and energy. IDL will be held on 16 May each year, the anniversary of the first successful operation of a laser in 1960. The laser is a perfect example of how a photonics discovery can yield revolutionary benefits to society. The International Day of Light Logo Created by SPIE The broad theme of light will allow many different sectors of society worldwide to participate in activities that demonstrate how the science, technology, and artistic expression of light can help achieve the goals of UNESCO — education, equality and peace. SPIE enthusiastically supports these goals and this annual celebration of lifesaving, life-enhancing light. The inaugural celebration of ...