1. Hawaiian Monarchy celebrations: Before Hawaii became a state in 1959, December 31 was celebrated as "Recognition Day". It marked the day in 1846 when the United States officially recognized the Hawaiian monarchy with a formal treaty of friendship. On this day, the monarchy would throw a grand ball at Iolani Palace in Honolulu.

2. End of the Sugar Era: December 31, 2016, was the end of the sugar era in Hawaii. The last operating sugar plantation in Hawaii, the Hawaiian Commercial and Sugar Company (HC&S), shut down on this day, ending an industry that had been a significant part of Hawaiian culture and economy for over a century.

3. Pearl Harbor Attack Anniversary: December 31, 2016, marked the 75th anniversary of the Japanese attack on Pearl Harbor, which led to the United States' entry into World War II. It was a solemn day of remembrance in Hawaii, with ceremonies and memorials held throughout the state.

4. Cheyne Walk Fire: On December 31, 1941, a devastating fire broke out at Cheyne Walk, a luxury residential complex in Waikiki, Oahu. The fire claimed the lives of five people and destroyed the homes of more than 50 families. It was one of the most destructive fires in Hawaii's history.

5. New Year's Eve Celebrations: Today, December 31 is celebrated as New Year's Eve in Hawaii, with fireworks displays, parties, and festivities held throughout the state. One of the most popular events is the Hootenanny at Aloha Tower Marketplace in Honolulu, which features live music, food, and fireworks over the harbor.