Annianus of Alexandria
In principle , each date of the 532-year Paschal cycle of Victorius’ Paschal table can be calculated by applying the old Roman rule “Paschal Sunday is the first Sunday after the first day after the Paschal full moon” to the corresponding date of the Paschal full moon of its lunar cycle ( if desired with the help of the number indicating the weekday of ) . 
<triplet> Julian calendar <subj> Gregorian calendar <obj> replaced by <triplet> Gregorian calendar <subj> Julian calendar <obj> replaces