Black Sea Fleet Day is observed in Russia every May 13, commemorating the establishment of the Black Sea Fleet in 1783 by Prince Grigory Potemkin. This fleet is a significant operational-strategic command of the Russian Navy, operating primarily in the Black Sea and the Mediterranean Sea, with Sevastopol serving as its principal base. The observance of this day highlights the fleet's historical importance, including its role during the Soviet era and subsequent tensions with Ukraine following the dissolution of the Soviet Union. In 2014, following the annexation of Crimea, many Ukrainian naval officers and ships were integrated into the Black Sea Fleet, further solidifying its presence and significance in the region. The day serves as a professional observance for the Russian Navy, celebrating its maritime heritage and operational capabilities.