b ▁Day . ▁The ▁first ▁practice , ▁since ▁ 2 0 1 4 ▁changes , ▁is ▁held ▁on ▁the ▁Monday ▁of ▁post - qual ifying ▁practice ▁shortly ▁after ▁the ▁finish ▁of ▁the ▁Ind y Car ▁practice . ▁The ▁second ▁practice ▁and ▁time ▁tri als ▁are ▁held ▁on ▁Th urs day , ▁the ▁day ▁before ▁Car b ▁Day . ▁Ind y Car ▁teams ▁are ▁not ▁permitted ▁to ▁practice ▁on ▁T ues day ▁through ▁Th urs day ; ▁however , ▁they ▁may ▁conduct ▁pit ▁stop ▁practice . ▁In ▁addition , ▁the ▁time ▁is ▁spent ▁setting ▁up ▁their ▁respective ▁pit ▁areas . ▁ ▁Car b ▁Day : ▁The ▁final ▁practice ▁session ▁before ▁the ▁race , ▁currently ▁held ▁on ▁the ▁Friday ▁before ▁race ▁day , ▁is ▁called ▁" Car b ure tion ▁Day " ▁( short ened ▁to ▁" Car b ▁Day " ▁since ▁ 2 0 0 0 ). ▁The ▁name ▁originally ▁came ▁from ▁the ▁fact ▁that ▁it ▁was ▁the ▁final ▁session ▁where ▁teams ▁could ▁t une ▁their ▁car b ure t ors ▁in ▁conditions ▁similar ▁to ▁those ▁that ▁might ▁be ▁encountered ▁on ▁race ▁day . ▁The ▁name ▁has ▁remained ▁despite ▁the ▁fact ▁that ▁no ▁qualified ▁car ▁has ▁used ▁a ▁car b ure tor ▁since ▁ 1 9 6 3 . ▁The ▁day ▁is ▁now ▁similar ▁to ▁most ▁mot ors port ▁week ends , ▁as ▁the ▁final ▁practice ▁is ▁accompanied ▁by ▁a ▁pit ▁stop ▁contest , ▁a ▁support ▁race , ▁and ▁a ▁concert . ▁The ▁Pit ▁Stop ▁Challenge ▁deb uted ▁in ▁ 1 9 7 7