篝火之夜（英语：Bonfire Night），又称盖伊·福克斯之夜（英语：Guy Fawkes Night）是指每年11月5日在英国举行的庆祝活动。按照传统习俗，当天人们会搭建篝火，燃放焰火，焚烧火药阴谋的策划者盖伊·福克斯炸毁英国议会大厦未遂。

节庆渊源可追溯至1605年11月5日，盖伊·福克斯和他的天主教教友们在议会大厦地底的一个地下室内存放大量炸药，计划在11月15日议会大幕当天引爆炸药炸死国王詹姆斯一世和其他议员，但被议会的保卫队长抓获，于次年2月10日在伦敦塔处死。为了纪念国家面临的这个迫在眉睫的危机，詹姆斯一世决定将11月5日定为篝火之夜。

Guy Fawkes Night, also known as Guy Fawkes Day, Bonfire Night and Firework Night, is an annual commemoration observed on 5 November, primarily in Great Britain. Its history begins with the events of 5 November 1605, when Guy Fawkes, a member of the Gunpowder Plot, was arrested while guarding explosives the plotters had placed beneath the House of Lords. Celebrating the fact that King James I had survived the attempt on his life, people lit bonfires around London, and months later the introduction of the Observance of 5th November Act enforced an annual public day of thanksgiving for the plot's failure.