Saint Dominic Feast Day - 4 August (Tridentine) - 8 August (Novus Ordo)

Quoted from Suscipe Domine [1]:

In 1216, St. Dominic founded the Order of Preachers for the express purpose of proclaiming the doctrine of the Church and defending it against errors. St. Dominic is also well known for meriting the reception of the Rosary from our Lady (though the Rosary’s origin is in apostolic times), the Ash Wednesday Miracle [2], and the admirable purity of his heart.

Saint Dominic is the only historical figure after whom two sovereign countries are named: Dominica and the Dominican Republic. The capital of the latter, Santo Domingo, also bears his name. [3]

Quoted from the Parish of St. Vincent Ferrer and St. Catherine of Siena in the Roman Catholic Archdiocese of New York [4]:

Our Holy Father Dominic, the founder of the Order of Preachers, died on August 6, 1221.  To mark the 800th Anniversary, the Parish will have several days worth of special celebrations.

 

[1] https://www.suscipedomine.com/forum/index.php?topic=26001.0

[2] Link to St. Dominic's Ash Wednesday Miracle:

http://www.dominicanwitness.com/st-dominics-ash-wednesday-miracle/

[3] https://en.wikipedia.org/wiki/Saint_Dominic#:~:text=Saint%20Dominic%20feast%20day%208%20August%20%284,August%20in%20the%20pre-1970%20General%20Roman%20Calendar%29, quoted without hyperlinks.

[4] https://svsc.info/2021/07/23/800th-anniversary-of-the-death-of-st-dominic-august-2-8/