April (Last Sunday)
Ozanam Sunday: Frederic Ozanam was born on April 23, 1813 in Milan, Italy. On April 23, 1833 Frederic and six companions founded the Society of St. Vincent de Paul. Also, St. Vincent de Paul was born on April 24, 1581. To commemorate these events the Society in the United States celebrates the last Sunday of April as Ozanam Sunday.
June (Friday following second Sunday after Pentecost)
Feast of the Sacred Heart: The Society of St. Vincent de Paul has been solemnly consecrated to the Sacred Heart of Jesus since February 5, 1872. An Act of Consecration was drawn up at the request of the Society in 1872, and this act of consecration is renewed annually by all units of the Society.
November 27th Feast of the Miraculous Medal
The medal of the Immaculate Conception was manifested to Sister Catherine Laboure in the Motherhouse of the Daughters of Charity in Paris, France on November 27, 1830.
December 8th Feast of the Immaculate Conception
Blessed Frederic Ozanam had a great devotion to Mary and declared Our Lady of the Immaculate Conception the patroness of the Society.