Debut & "MAMA" Era (2012)

• 111222 Teaser Debut teaser #1 released
• 120309 Teaser Debut teaser #23 released
• 120130 Album (Single) Prologue single #1 "What Is Love" released
• 120309 Album (Single) Prologue single #1 "History" released
• 120331 Showcase Debut Showcase in Seoul
• 120401 Showcase Debut Showcase in Beijing
• 120408 Debut EXO debut date
• 120409 Album (Mini) "MAMA" Album release (EXO-K & EXO-M)