Celebrating the Holy Men and Women of the Church All Saints Day Or All Hallows’ Day, the Feast of All Saints, the Feast of All Hallows, the Solemnity of All Saints, and Hallowmas, Typically a Holy Day of Obligation (though lifted this year) Celebrated November 1 in Western Christianity, the Sunday after Pentecost in Eastern Christianity All Saints celebrations began in the Mesopotamia the fourth century to commemorate the martyrs. It spread across the Mediterranean, eventually making its way to