Mahony was accepted into nursing school on March 23, 1878, signaling a significant milestone.
On March 23, 1878, Mary Eliza Mahony was accepted into the New England Hospital for Women and Children Training School for Nurses. This was a notable achievement as the hospital was one of the first to offer professional nursing training, long before many nursing programs existed. Her entrance into this predominantly white institution marked one of the first significant racial breakthroughs in nursing. For approximately 15 years prior, Mahony had worked in various roles at the hospital, learning the art of patient care and preparing herself for a formal nursing education. This step paved the way for her and other African American women, challenging societal norms and setting a precedent for inclusion in nursing education.