1. In 1986, on this day, the Kilauea Volcano on the island of Hawaii erupted, beginning a series of eruptions and earthquakes that lasted for five months. The eruption caused widespread damage and forced the evacuation of thousands of local residents.

2. On April 28, 1927, the Inter-Island Airways (now Hawaiian Airlines) made its first flight from Honolulu to Hilo, marking the beginning of commercial air travel in Hawaii.

3. In 1900, on this day, the Territory of Hawaii was officially established, giving Hawaii a formal political and legal status within the United States.

4. On April 28, 1947, the Kon-Tiki, a raft made of balsa wood, completed its 4,300-mile journey from South America to the Polynesian islands of French Polynesia. The expedition, led by Norwegian explorer Thor Heyerdahl, was intended to prove that ancient people could have traveled across the Pacific Ocean.

5. In 1978, the first Ironman Triathlon was held on the island of Oahu. The race, which consists of a 2.4-mile swim, a 112-mile bike ride, and a 26.2-mile run, has since become one of the most iconic and challenging endurance events in the world.