Fans of K-pop superstars BTS member V marked his 25th birthday on Dec. 30 by running an ad on Burj Khalifa, the world’s tallest building, in Dubai. The ad was run at 6:50 p.m. in Dubai, or 23:50 p.m. in Korea, on Dec. 29 with the theme song “Winter Bear” by V that was released in August last...