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 to debut 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.
In mid-2015, drummer Dowoon was added in the line-up and the band was renamed to DAY6.
DAY6 released their debut EP, The Day, with the lead single “Congratulations” on September 7, 2015.
On February 27, 2016, JYP Entertainment stated that Junhyeok had departure from the band due to personal reasons and terminated his contract with the company. DAY6 remained as a five-member band and released their second EP, Daydream, with the title track “Letting Go” on March 30. On March 31, DAY6 made their official debut stage on the music program M Countdown, after six months their debut.