Burj Khalifa staged a record-setting New Year's Eve LED and fireworks show in 2015.
On December 31, 2015, Dubai used the facade of Burj Khalifa for a large-scale light and LED presentation accompanied by fireworks. The show was designed around the world's tallest building, turning its vertical exterior into a giant display visible across Downtown Dubai. It was recognized by Guinness World Records for the largest LED-illuminated facade.
Burj Khalifa had already become a major New Year's Eve landmark through earlier fireworks celebrations. Its height, position beside the Dubai Fountain, and visibility from much of the city made it a natural centerpiece for Dubai's countdown. Later celebrations have used changing combinations of fireworks, lasers, projections, and LED effects.
The 2015 record concerns the illuminated facade, not the building's height or the largest fireworks display. Burj Khalifa opened in 2010 and remains the tallest completed building, but that separate fact is not what the question asks.