Battle of Gangut Day is observed in Russia on August 9 every year as one of the Days of Military Honor in the Russian Armed Forces. This day commemorates the naval battle that occurred in 1714 during the Great Northern War between Russia and Sweden, specifically outside the Hanko Peninsula in Finland. The Battle of Gangut, also known as the Battle of Hangö, resulted in a decisive victory for the Russian Navy, marking it as the first significant triumph in the military history of Russia. This victory was crucial as it opened the coastal seaway for Russian transport and led to the Russian army's control over Åland, forcing the remnants of the Swedish army in Finland to retreat. Celebrations are primarily military in nature, and the day is not recognized as a public holiday. The Russian Navy has a longstanding tradition of naming vessels after Gangut, with the last ship named Gangut launched in 1911.