DAY6 (Korean: 데이식스) is a South Korean boy band formed by JYP Entertainment in 2014. 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.