The Day of the Baltic Unity is observed in Latvia and Lithuania every September 22. This holiday was established in 2000 to commemorate the Battle of Saule, which took place in 1236 when Baltic tribes, led by Vykintas, the Duke of Samogitia, defeated the Livonian Brothers of the Sword. This victory inspired other conquered tribes to rebel against their oppressors during the Livonian Crusade. The holiday aims to bring the Baltic peoples together and strengthen ties between the two nations. Celebrations typically include official receptions, conferences, exhibitions, cultural events, and concerts, fostering a sense of unity and shared history among the Baltic states.