DAY6 (Hangul: 데이식스) is a South Korean boy band formed by JYP Entertainment in 2015. The band is composed of five members: Jae, Sungjin, Young K, Wonpil, and Dowoon. Originally a six-piece band, Junhyeok later departed from the band in February 2016. The band debuted with their first mini-album, The Day on September 7, 2015.
JYP Entertainment initially announced the debut of a five-member band called 5LIVE, composed of Sungjin, Jae, Young K, Junhyeok, and Wonpil. In 2014, the band began promotions with appearing on the fourth episode of Mnet's reality-survival program Who is Next: Win and releasing a song titled "Lovely Girl" as part of the original soundtrack of 2013 TV series Bel Ami.