▁ 1 9 0 9 ▁in ▁which ▁the ▁Speed way ▁was ▁incorpor ated . ▁Since ▁ 2 0 1 7 , ▁Found ers ▁Day ▁is ▁sometimes ▁used ▁as ▁the ▁date ▁in ▁which ▁induct ees ▁to ▁the ▁Indian apolis ▁Motor ▁Speed way ▁Hall ▁of ▁Fame ▁are ▁announced . ▁ ▁Memorial ▁Day ▁The ▁race ▁has ▁always ▁been ▁scheduled ▁in ▁conj unction ▁with ▁Memorial ▁Day ▁except ▁ 2 0 2 0 ▁when ▁the ▁race ▁was ▁post pon ed ▁until ▁August ▁ 2 3 . ▁Through ▁ 1 9 7 0 , ▁the ▁race ▁was ▁held ▁on ▁Memorial ▁Day ▁proper ▁( May ▁ 3 0 ), ▁regardless ▁of ▁the ▁day ▁of ▁the ▁week , ▁unless ▁it ▁fell ▁on ▁Sunday . ▁In ▁those ▁cases ▁it ▁was ▁scheduled ▁for ▁Monday ▁May ▁ 3 1 . ▁After ▁the ▁Un iform ▁Monday ▁Hol iday ▁Act ▁took ▁effect ▁in ▁ 1 9 7 1 , ▁the ▁race ▁was ▁scheduled ▁as ▁part ▁of ▁the ▁three - day ▁Memorial ▁Day ▁week end ▁- ▁either ▁the ▁Saturday , ▁the ▁Sunday , ▁or ▁the ▁Monday ▁of ▁the ▁hol iday ▁week end . ▁Since ▁ 1 9 7 4 , ▁the ▁race ▁has ▁been ▁scheduled ▁for ▁the ▁Sunday ▁of ▁Memorial ▁Day ▁week end , ▁and ▁has ▁been ▁held ▁on ▁a ▁Sunday ▁with ▁only ▁two ▁exceptions ▁due ▁to ▁rain ▁del ays . ▁ ▁Sund ays ▁were ▁avoided ▁for ▁sched uling ▁race ▁activity ▁d ating ▁all ▁the ▁way ▁back ▁to ▁pre - 5 0 0 ▁races ▁in ▁ 1 9 0 9 ▁and ▁ 1 9 1 0 .