Saturday (세러데이) is a South Korean girl group under Yoonso Group. They originally debuted as a seven-member group with the single "MMook JJi BBa" on July 18, 2018.
On December 1, 2018, the visual member, Chaewon left the group to focus on her studies.
On January 2019, Juyeon was then added to the group.
On March 2019, the lead vocalist member, Sunha left the group to focus on her own career.
On April 13, 2019, Minseo was added to the line-up.
On September 5, 2019, the leader member, Chohee and the main vocalist member, Sion left the group for personal reasons.
On July 18, 2023, SD Entertainment posted a statement about Haneul leaving the group.