So i'm redeiting the birthday alittle shorter by months so it will be easier

Idols Bday.

-Lee Sungmin (Super Junior) – Jan 1, 1986

Kim Seunghwan (A-Peace ‘Jade’) – Jan 1, 1994

----Yuzi (EXID) – Jan 2, 1991

Ferlyn (SKARF) – Jan 2, 1992

Lee Jeongmin (Boyfriend) – Jan 2, 1994

----Sungwoo (F.I.X) – Jan 3, 1983

Seolhyun (AOA) – Jan 3, 1995

----Shiho (April Kiss) – Jan 5, 1986

Yang Yoseob (Beast) – Jan 5, 1990

----JB (JJ Project/Actor) – Jan 6, 1994

----Choi Howon (HITT) – Jan 7, 1992

----Jimin (AOA) – Jan 8, 1991

Kim Yongseok (Cross Gene) – Jan 8, 1993

----Nam Jihyun (4minute) – Jan 9, 1990

----Brian Joo (Fly To The Sky *Disbanded*/Solo Singer) – Jan 10, 1981

Gajin (JQT) – Jan 10, 1989

----Hyorin (Sistar) – Jan 11, 1991

J-Da (EvoL) – Jan 11, 1994

----Sunday (CSJH The Grace) – Jan 12, 1987

D.O (EXO-K) – Jan 12, 1993

J.G (Cross Gene) – Jan 12, 1993

----Lee Seunggi (Solo Singer/Actor) – Jan 13, 1987

Johoon (7.9.4.2/Actor) – Jan 13, 1988

----Koo Hara (Kara) – Jan 13, 1991

Lee Duhwan (CHAOS) – Jan 13, 1993

----Boa (SPICA) – Jan 14, 1987

Kai (EXO-K) – Jan 14, 1994

----Junsu (2PM/Solo Singer) – Jan 15, 1988

----Hwanhee (Former Fly To The Sky *Disbanded*/Solo Singer) – Jan 17, 1982

Kangin (Super Junior) – Jan 17, 1985

Gayeon (HAM) – Jan 17, 1989

Lee Kiseop (U Kiss) – Jan 17, 1991

----Sunghak (BIGSTAR) – Jan 18, 1992

Minzy (2NE1) – Jan 18, 1994

Jiyoung (Kara) – Jan 18, 1994

Keon U (Former LED Apple) – Jan 18, 1991

----Lime (Hello Venus) – Jan 19, 1993

----Kwanghaeng (Co-Ed) – Jan 20, 1990

----Andy Lee (Shinhwa) – Jan 21

----I-OH (Former LED Apple) – Jan 22, 1991

Park Jinseok (SHU-I) – Jan 22, 1991

----Park Jiyeon (GLAM) – Jan 23, 1992

----Yooyoung (Hello Venus) – Jan 23, 1995

----Minyoung (Twi-light) – Jan 24, 1989

Yoo Youngjae (B.A.P) – Jan 24, 1994

----Junho (2PM) – Jan 25, 1990

Minsun (Former JQT) – Jan 25, 1987

----Kim Bumsoo (Solo Singer) – Jan 26, 1979

Jaejoong (Former DBSK/JYJ/Actor) – Jan 26, 1986

Hanbang (Smash) – Jan 26, 1989

Park Hyungjoon (SHU-I) – Jan 26, 1989

----Lee Gunwoo (MYNAME) – Jan 30, 1989

Bora (Sistar) – Jan 30, 1990

Hanjun (Former TOUCH) – Jan 30, 1990

Hwang Duhwan (A-Peace ‘Onyx’) – Jan 30, 1994

----Yoonhwa (T-Max *Disbanded*) – Jan 31

Please comment and tell me if i'm missing anybody thankyou

(The credit/source is http://soeulmateskoreanaddicts.wordpress.com/k-idol-birthday-2/ )