Good Day (Korean: 굿데이) is a ten-member South Korean girl group formed by C9 Entertainment. They debuted on 30 August 2017, with their 1st mini album “All Day Good Day”.
In 2012, Haeun was part of a 3 member girl group Littles, under Nega Network but never debuted. The group’s only release is an OST for drama The Great Seer.
In 2013, Heejin took part in Superstar K5and finished in 3rd place. Bomin appeared in movie No Breathing, as the younger version of Yuri’s role.
In 2015, Heejin released her debut single titled “To Reach You”, which features rapper Olltii. She has also sang OSTs for dramas Late Night Restaurant and Into the Flames.
Jiwon is currently a model under teenage fashion online shopping portal Sonyunara since pre-debut.
In July 2017, C9 Entertainment announced the launching of their first girl group, C9 Girls. On 7 July, members Genie and Nayoon were revealed, alongside the group name Good Day. On 10 July, members Bomin, Jiwon and Lucky were revealed. On 11 July, members Cherry, Chaesol and Viva were revealed. On 12 July, members Heejin and Haeun were revealed. On 15 and 16 July, the group revealed the members’ clean version teaser photos and B-cut teaser photos respectively. From 20 July to 10 August, on Thursdays, 4 episodes of their reality show, GOOD DAY 2 U, has been shown on C9 Entertainment’s V App channel.
On 30 August, they debuted with their first mini album “All Day Good Day”, with the music video for their debut title track “Rolly” featuring the appearance of C9 Entertainment trainee and current Wanna One member Bae Jin-young. The other 3 tracks from the mini album are songs from the group’s 3 units: Good Morning, Good Night and Midnight. On 3 September, they have held their debut mini concert “All Day Good Day” at the Yes24 Live Hall.
Six members (Heejin, Genie, Chaesol, Jiwon, Viva, Lucky) were confirmed to join the reality television series The Unit. All, except Lucky, passed the Boot Evaluations in Episode 1. However, Lucky was brought back into the competition in Episode 4. Genie and Chaesol were eliminated in the first elimination round (Episode 7). Heejin, Viva and Lucky were eliminated in the third elimination round (Episode 13). Jiwon finished 11th in the finals, therefore not being able to be a part of UNI.T.
On 1 November, it was announced that Nayoon will take a break from the group’s activities for about 8 weeks due to a tear in her ligament during practice.