SATURDAY (세러데이) is a seven-member girl group under SD Entertainment. They debuted on July 18, 2018 with the single “MMook JJi BBa”.
On July 5, SD Entertainment reveal that a new girl group will debut the same month. Their name will be SATURDAY and the group will be consisting of seven members. and Haneul, Chaewon, Sunha, Sion on July 10.
On July 10, the first teaser for the group’s debut single “MMook JJi BBa” was released and the second one on July 15.
The group officially debuted with the music video for “MMook JJi BBa” on July 18. Alongside the music video, they released introduction videos in Chinese, English, Korean, and Japanese.
On December 1, the group’s fancafe announced Chaewon’s departure after deciding to leave in order to focus on her studies.
On December 3, the group announced they will be coming back with a special Christmas single “To Sunday Christmas”. It consisted of three tracks: “All I Want For Christmas Is You” a cover of Mariah Carey’s song by the same title, performed by members Sion and Sunha, “In Your Eyes” performed by Yuki, Ayeon and Haneul, “Kiss Me” performed by Chohee.
On January 22, Juyeon was introduced as the group’s newest member, retaining the 7-member lineup. The following day, SATURDAY posted a “2nd album profile photo” of Ayeon, officially confirming the fact that the group is preparing for a comeback.
On February 1, the single’s title was officially announced to be “Follow SATURDAY”.
Source: kpop wiki