Hundreds of people across Nottinghamshire turned off their lights and left just one candle burning on Monday night to remember those who died in World War One.
The gesture saw lights turned off at 10pm for an hour.
It was inspired by the words of Britain's then Foreign Secretary, Sir Edward Grey, who said: "The lamps are going out all over Europe; we shall not see them lit again in our lifetime."
Here's how Nottingham marked the occasion.
Lights out with Gedling Royal British Legion pic.twitter.com/HqOhMJfEOb
— Sharon Ellis (@sharonellis21) August 5, 2014A thought too for the #WarHorses and other animals who also lost their lives on the battlefields #lightsout#whttp://t.co/qMDsMetgHR
— Sue B (@Susieb306) August 5, 2014My lights went out and a candle lit. #LightsOut#WW1centenary#NeverForgetpic.twitter.com/VBFmpw1IpE
— Lisa Harrison (@lm_harrison) August 4, 2014Mapperley war memorial. #WW1centenary#lightsouthttp://t.co/GMvr84E9FW
— Laura Patterson (@LauraFreshPhoto) August 4, 2014#LightsOut#LeastWeForget#ww1pic.twitter.com/605hmoanFa
— Kirsty (@Kirhilli) August 4, 2014#LightsOut for the old boys pic.twitter.com/M7VJaiuCi1
— Jack Bennett (@quavor) August 4, 2014#LightsOut don't have candles so next best thing...#rememberthem#WW1pic.twitter.com/4mz20olkjS
— KCG (@KirstyRalph11) August 5, 2014