Today, May 16th, is the International Day of Light 2018. It began in 2015 when the U.N. declared The International Year of Light and Light-based Technologies. Today, the International Day of Light is
a global initiative that provides an annual focal point for the continued appreciation of light and the role it plays in science, culture and art, education, and sustainable development, and in fields as diverse as medicine, communications, and energy. The broad theme of light will allow many different sectors of society worldwide to participate in activities that demonstrates how science, technology, art and culture can help achieve the goals of UNESCO – education, equality, and peace.
There are events around the globe related to the theme of light. If you’re interested you can check the web site, and the sites of organizations such as IALD and IES.