▁at ▁the ▁annual ▁iv y ▁day ▁preceding ▁comm enc ement . ▁Stud ents ▁may ▁also ▁have ▁a ▁select ive ▁process ion ▁prior ▁to ▁the ▁official ▁comm enc ement ▁walk ▁to ▁honor ▁each ▁stone ▁being ▁placed ▁on ▁the ▁buildings . ▁On ▁some ▁occasions ▁students ▁plant ▁iv y ▁in ▁front ▁or ▁on ▁the ▁side ▁of ▁their ▁iv y ▁stones . ▁Pr inc eton ▁University ▁also ▁places ▁class ▁iv y ▁stones ▁on ▁the ▁walls ▁of ▁its ▁buildings , ▁a ▁few ▁days ▁prior ▁to ▁their ▁comm enc ement . ▁Stud ents ▁are ▁known ▁to ▁give ▁speech es ▁at ▁I vy ▁Day ▁to ▁comm emor ate ▁their ▁time ▁and ▁work ▁at ▁the ▁college . ▁Select ▁medical ▁schools ▁also ▁particip ate ▁in ▁I vy ▁Day ▁prior ▁to ▁their ▁White ▁Co at ▁Cer em ony . ▁ ▁References ▁ ▁Category : Tr ad itions ▁Category : C er emon ies ▁Category : B ates ▁College <0x0A> </s> ▁R olf ▁Alfred ▁Stein ▁( 1 3 ▁June ▁ 1 9 1 1 ▁– ▁ 9 ▁October ▁ 1 9 9 9 ) ▁was ▁a ▁German - born ▁French ▁Sin ologist ▁and ▁Tib et ologist . ▁He ▁contributed ▁in ▁particular ▁to ▁the ▁study ▁of ▁the ▁Ep ic ▁of ▁King ▁Ges ar , ▁on ▁which ▁he ▁wrote ▁two ▁books , ▁and ▁the ▁use ▁of ▁Chinese ▁sources ▁in ▁Tib et an ▁history . ▁He ▁was ▁the ▁first ▁scholar ▁to ▁correctly ▁identify ▁the ▁Min y ag ▁of ▁Tib et an ▁sources ▁with ▁the ▁X ix ia ▁of ▁Chinese ▁sources . ▁ ▁Stein ▁was ▁born ▁in ▁Schw