On 21 October 1983, the General Conference of Weights And Measures adopted the value of 299,792.458 km/s for the speed of light. At the occasion of the anniversary, over 100 activities will be organized in more than 30 countries in the world and encompass all kinds of demonstrations and discussions on the impact of photonics on our day-to-day life.

Any company, research organization, university, is welcome to organize an activity. Please contact the organizers to have your event listed!

More info can be found on http://day-of-photonics.org/activities-on-21-october-2014/