... Have a birthday on April 20? Were there any news articles (on rockymountainnews or denverpost or huffingtonpost) where a student (or teacher or someone who was there) talks about the shooting being on their birthday?
How weird would it feel if you turned fifteen on April 20, 1999 and went to Columbine, this year being the fifteenth anniversary and all.
Or if you currently go to Columbine and your birthdate is April 20, 1999. And especially weird if you were born at the time the shooting began or at the time E&D committed suicide.