I am sure fans who had been following would know their age ranking?

Well, just in case you don't really know, this is it xD

And actually this can be found on EXO-TODAY! 2013 

And I have added the Yaja Time cut with subs by baekhundred.

Probably, remembering it the other way would help? :p 

EXO Yaja Time!

EXO from oldest to youngest:

• XIUMIN – 시우민 – March 26, 1990   <- Eldest

• LUHAN – 루한 – April 20, 1990

• KRIS – 크리스 – November 6, 1990

• SUHO – 김준 면 – May 22, 1991

• LAY – 레이 – October 7, 1991

• BAEKHYUN – 백현 – May 6, 1992

• CHEN – 첸 – September 21, 1992

• CHANYEOL – 박찬열 – November 27, 1992

• D.O. – 디오 – January 12, 1993

• TAO – 타오 – May 2, 1993  <- Youngest (EXO-M)

• KAI – 카이 – January 14, 1994 

• SEHUN – 세훈 – April 12, 1994   <- Youngest (EXO-K)

Another fact would be: Despite Xiu Min being the eldest, Kris was made the elader of EXO-M due to the langauge skills. And also, Kris possess the leadership quality in him which made him more suitable to be the team's leader ^^

Sources are credited via links shown. If not, no ownership claimed for this Article/Compilation.