Later this year, people all over the UK will be asked to turn off all lights, bar one, as a sign of reflection and to mark the beginning of the First World War.
At 11pm on August 4th, 1914, Britain declared war with Germany, resulting in a four year struggle that would cost the lives of millions and impact across the world. At the time, the British Foreign Secretary made the famous remark: "The lamps are going out all over Europe; we shall not see them lit again in our life-time".
This August, exactly 100 years on from that date, people all over the UK are invited to symbolically mark that iconic moment.
Organised by 14-18 NOW, a cultural organisation tasked with marking the centenary of the First World War, the aim is to have artists design digital light works available for download as well as site-specific, large cale works at locations across the UK.
The event on August 4th is just one a range of activities and initiatives being organised to mark The Great War, including collaborations with German arts organisations.
Check out the 14-18 NOW website for a full itinerary of their commemorative activities.