DAY6 (Hangul: 데이식스) is a South Korean rock band, comprised of four members: Sungjin(leader, rhythm guitar, vocals), Young K (bass, vocals, rap), Wonpil (keyboards, synthesizer, vocals), and Dowoon (drums, backing vocals).

As the name may suggest, they were originally a six member band. Junhyeok (keyboard, vocals) departed in February 2016. Jae (lead guitar, vocals, rap; also active as eaJ) departed the group on December 31st 2021.