1. On September 18, 1895, the last queen of Hawaii, Queen Liliuokalani, renounced her throne at the royal palace in Honolulu. She was forced to do so after a coup d'etat by a group of American businessmen.

2. In 1931, the Hawaii Pineapple Company (now Dole Food Company) became the first company to successfully ship fresh pineapples to the US mainland. This helped turn Hawaii into a major producer and exporter of pineapples.

3. The USS Arizona Memorial in Pearl Harbor was dedicated on September 18, 1962. The memorial honors the service members who died on the USS Arizona during the Japanese attack on Pearl Harbor on December 7, 1941.

4. On September 18, 1974, the Mauna Loa Observatory recorded the highest carbon dioxide concentration in the atmosphere at that time, reaching 330 parts per million. Today, that number has exceeded 415 parts per million, indicating a significant increase in greenhouse gases over the past few decades.

5. In 1992, Hurricane Iniki made landfall on the island of Kauai, causing significant damage and leaving six people dead. It was the strongest hurricane to hit Hawaii in recorded history at the time, with winds reaching up to 145 miles per hour.