Thomas Sunday is also called "Antipascha" (literally, "in the place of Pascha") because those who for honorable reason were not able to attend the Paschal Vigil, may attend services on this day instead. In middle Greek "anti" Pascha also means "enter" Pascha. Pascha is a unique feast in the church year; being the "Feast of Feasts" it follows a format unlike any other day. Those liturgical elements normal to a Great Feast of the Lord which were displaced by Pascha's unique elements are instead chanted on Thomas Sunday.