Low Sunday, Quasi Modo Sunday, Dominica in Albis Deponendis, and now Mercy Sunday. I think the first Sunday after Easter is the most named on the Roman Church’s calendar. And for the last several years, it has also been richly indulgenced, in response to the revelations of Our Lord to Saint Faustina. The conditions for the Plenary Indulgence are given here on the EWTN web site.
