Landing of the 33 Patriots Day is celebrated in Uruguay on the Monday closest to April 19, with the observance in 2026 occurring on April 20. This holiday commemorates the historic event when the military group known as the Thirty-Three Orientals crossed the Plata River to plant their flag and assert dominance over a war-torn region in Brazil. The day marks the anniversary of their courageous act, which initiated a civil-disobedience movement and ultimately led to Uruguay's declaration of independence from Brazil. Traditionally celebrated on April 19, the holiday has since been moved to the nearest Monday. Typical customs include federal recognition of the day, and it serves as a reminder of Uruguay's struggle for sovereignty and the valor of those who fought for it.