The official Feast Day in the Catholic Church of Blessed Father Michael McGivney, founder of the Knights of Columbus is celebrated on August 13th across the universal Catholic Church. Bl. Fr. McGivney was born on August 12, 1852 and passed away on August 14, 1890 (aged 38). His feast day is celebrated on the 13th because it falls between these two dates. Bl. Fr. McGivney was Beatified on October 31, 2020 at the Cathedral of Saint Joseph in Hartford, Connecticut by Cardinal Joseph W. Tobin (on behalf of Pope Francis). This Cathedral is the Diocese Seat for the Bl. Fr. McGivney Shrine that also was the final parish church he served at during his life as a priest. This is also where he founded the Knights at the Church of Saint Mary in New Haven, Connecticut.
You can find out more about Bl. Fr. McGivney here.
From the Knights of Columbus