'Tis the Monday within the Octave of Easter: Octave-link.
Otherwise, 17 April would be the festival of Blessed Henry Heath, Priest & Martyr, O.F.M. Rec. (circa 1599-1643), martyred in the reign of the king Charles I, one of the Eighty-five Martyrs of England & Wales: Martyr-link & Wikipedia-link; Wikipedia-link LXXXV.
Commentary: There is no Wayback Machine link to past 17 Aprils as further research indicates that the saints we had been honoring on 17 April would be more appropriately honored on alternate dates. Project BLACK MAMBA is subject to continual improvement & refinement, all glory to God.
Scripture of the Day
The Acts of the Apostles, chapter two, verses fourteen & twenty-two thru thirty-three;
Psalm Sixteen, verses one, two(a), & five; seven & eight; nine & ten; & eleven;
The Gospel according to Matthew, chapter twenty-eight, verses eight thru fifteen.