Knights of Columbus Founders Day is celebrated annually on March 29 across the United States. This day holds special significance for the Knights of Columbus, a Catholic fraternal organization that was founded by Michael J. McGivney when he received the charter from the State of Connecticut. The organization began as a mutual benefit society for Catholic immigrants, providing financial support and services. Over time, it expanded its mission to include charitable work such as refugee aid and assistance during natural disasters, while also supporting Catholic church causes. The Knights of Columbus emphasize principles of patriotism, charity, unity, and fraternity, with charity being considered the most important. On this day, members reinforce their commitment to these values and the support of the Catholic community.