1. In 1898, the US annexation of Hawaii became official on June 6th. This ended Hawaii's status as an independent nation and made it a United States territory.

2. On June 6, 1922, a massive Hawaiian tsunami hit Hilo causing significant damage and loss of life. The tsunami was triggered by an earthquake that occurred off the coast of Central Chile.

3. June 6, 1944 marked the beginning of the Allied invasion of Normandy during World War II, which had a significant impact on Hawaii. Due to its strategic location in the Pacific, Hawaii played a vital role in the war effort and was a major hub for military operations.

4. In 1959, June 6th marked the day of the official signing of the Hawaii Admission Act, which made Hawaii the 50th state of the US. This historic moment marked the end of Hawaii's territorial status and the beginning of its status as a state of the United States.

5. June 6, 2018 marked the eruption of the Kilauea volcano on the Big Island of Hawaii. The eruption caused extensive damage to homes and roads, and led to the evacuation of thousands of residents. The eruption continues to have a significant impact on the region's ecology, as well as the lives of those who were affected by it.