Day6 is a KPop group under JYP Entertainment who debuted on September 7, 2015 with their song The Day and the title track Congratulations. Currently, the group consists of five members: Sungjin, Jae, Wonpil, Young K, and Dowoon. Junhyeok left the group in early 2016 due to personal reasons.

Since 2015, the group has released a large number of Day6 T-Shirts at its many fan meetings and concerts.