The St. Monica Boosters hosts their largest fundraiser of the year celebrating the conclusion of Catholic Schools Week. This event, which dates back to the 1980’s and has evolved throughout the decades as a part of the Booster Bash celebration, is now called the Irish Jubilee. The St. Monica Catholic School Boosters hosted the first annual Irish "Diamond" Jubilee in 2018, marking the 60th anniversary of the school. This event filled evening at the Moors Golf Club includes h'orderves, drinks, silent and live auctions, and a celebration of the St. Monica community.
In 2018, the Irish Jubilee raised over $52,000 for classroom needs and capital improvements.