
Good Day [굿데이]
- Debut (Y-M-D): 17-08-30
- Disbanded: c. 2019
- Label: C9 Entertainment
- Music Videos:
- Korean MVs: Rolly
- Albums:
- Korean:
- Mini Album: All Day Good Day (2017)
- Korean:
- Units:
- Morning
- Midnight
- Night
- Fan Name: N/A
- Logo:

Members:

- Stage Name (Hangul): Heejin (희진)
- Position: Leader, Vocal
- Real Name: Song Heejin (송희진)
- Birthday (Y-M-D): 95-08-19
- Nationality: Korean
- Height: 162cm
- Blood Type: B
- Unit: Night
- Now in: Solo



- Stage Name (Hangul): Chaesol (채솔)
- Position: Vocal, Visual
- Real Name: Moon Chaesol (문채솔)
- Birthday (Y-M-D): 98-07-14
- Nationality: Korean
- Height: 169cm
- Blood Type: A
- Unit: Midnight
- Now in: Cignature


- Stage Name (Hangul): Jiwon (지원)
- Position: Vocal, Face
- Real Name: Kim Jiwon (김지원)
- Birthday (Y-M-D): 99-48-01
- Nationality: Korean
- Height: 164cm
- Blood Type: O
- Unit: Morning
- Now in: Cignature as Jeewon



- Stage Name (Hangul): Bomin (보민)
- Position: Vocal, Rap, Visual
- Real Name: Kim Bomin (김보민)
- Birthday (Y-M-D): 01-09-24
- Nationality: Korean
- Height: 169cm
- Blood Type: AB
- Unit: Morning
- Formerly in: REDSQUARE

- Stage Name (Hangul): Lucky (럭키)
- Position: Dance, Vocal, Maknae
- Real Name: Jin Hyeonju (진현주)
- Birthday (Y-M-D): 01-11-03
- Nationality: Korean
- Height: 162cm
- Blood Type: A
- Unit: Morning
- Now in: Cignature as Belle
Social Media + :
- Twitter – Instagram – Facebook
- Homepage – Fan Cafe
- YouTube – V Live – TikTok