The World Record of Longest Singing Marathon is 19 Hours and was achieved by Nandlal Ahi in Delhi, India on 4th Sep 2021 . Nandlal Ahi Started the Singing Marathon on 4th September 2021 and Finished on 5th September 2021. His Singing Skills and spirit Made him Set Worldwide World Records. Worldwide Book of Records Salutes his Talent. This Event is being recorded on video with the rules laid out by Worldwide Book Of Records. Nandlal Ahi sang Multiple songs for 19 Hours to set the Longest Singing Marathon World Record for Worldwide Book of Record.