▁the ▁saint ▁under ▁the ▁name ▁given ▁to ▁him ▁in ▁the ▁Can on ▁of ▁the ▁Mass , ▁removed ▁ 1 3 ▁July ▁as ▁a ▁fe ast ▁day ▁for ▁Saint ▁An ac let us . ▁The ▁ 1 4 ▁February ▁ 1 9 6 1 ▁Inst ruction ▁of ▁the ▁Cong reg ation ▁for ▁R ites ▁on ▁the ▁application ▁to ▁local ▁cal end ars ▁of ▁Pope ▁John ▁XX III ' s ▁mot u ▁proprio ▁Rub ric ar um ▁instruct um ▁of ▁ 2 5 ▁July ▁ 1 9 6 0 , ▁decre ed ▁that ▁" the ▁fe ast ▁of ▁' Saint ▁An ac let us ', ▁on ▁whatever ▁ground ▁and ▁in ▁whatever ▁grade ▁it ▁is ▁celebrated , ▁is ▁transferred ▁to ▁ 2 6 ▁April , ▁under ▁its ▁right ▁name , ▁' Saint ▁C let us ' ". ▁Use ▁of ▁this ▁calendar , ▁which ▁is ▁included ▁in ▁the ▁ 1 9 6 2 ▁edition ▁of ▁the ▁Roman ▁Miss al , ▁continues ▁to ▁be ▁author ized ▁under ▁the ▁conditions ▁indicated ▁in ▁the ▁mot u ▁proprio ▁Sum mor um ▁Pont ific um ; ▁but ▁the ▁fe ast ▁has ▁been ▁removed ▁from ▁the ▁General ▁Roman ▁Calendar ▁since ▁ 1 9 6 9 . ▁Although ▁the ▁day ▁of ▁his ▁death ▁is ▁unknown , ▁Saint ▁C let us ▁continues ▁to ▁be ▁listed ▁in ▁the ▁Roman ▁Mart y ro log y ▁among ▁the ▁sain ts ▁of ▁ 2 6 ▁April . ▁ ▁Notes ▁ ▁References ▁Donald ▁Att water ▁and ▁Catherine ▁Rach el ▁John , ▁The ▁P engu in ▁Dictionary ▁of ▁Sain ts ,