1. In 1492, Christopher Columbus landed in the Bahamas, which is celebrated as Columbus Day in the United States. However, in Hawaii, October 12 is known as Discoverer's Day, and it honors the Polynesians who first discovered and settled the Hawaiian Islands.

2. In 1810, Kamehameha I, the first king of Hawaii, officially established the Kingdom of Hawaii by unifying the islands under his rule. This day is celebrated as Kamehameha Day in Hawaii.

3. In 1864, the first Japanese immigrants arrived in Hawaii to work on sugar plantations. This marked the beginning of a significant Japanese immigrant population in Hawaii, which has had a significant impact on the state's culture and economy.

4. In 1984, the Mauna Loa volcano on the Big Island of Hawaii erupted, sending lava flows towards the town of Hilo. Fortunately, the lava flow was diverted before it could reach the town, but the eruption caused significant damage to local agriculture and infrastructure.

5. In 2007, Hawaii became the first state in the United States to ban smoking in all enclosed workplaces, including bars and restaurants. This groundbreaking public health policy has since been adopted by many other states and countries around the world.