1. In 1777, Captain James Cook became the first European to land in Hawaii. He arrived on the island of Kauai on September 25th and named it the Sandwich Islands, after his patron, the Earl of Sandwich.

2. The Battle of Mokuohai was fought on September 25th, 1782. It was a conflict between two rival Hawaiian chiefs, Kamehameha and Keawemauhili, which ended with Kamehameha's victory and his subsequent rise to power in the islands.

3. On September 25th, 1923, the first radio broadcast was made in Hawaii by KGU, a Honolulu-based station. The program featured a speech by Governor Wallace Farrington and marked the start of a new era of communication for the islands.

4. The USS Bowfin, a World War II submarine, was commissioned on September 25th, 1942. The vessel was later nicknamed the "Pearl Harbor Avenger" for its part in sinking more than 44 enemy ships during the war.

5. In 1959, Hawaii became the 50th state of the United States on September 25th. The day is now celebrated as Statehood Day in Hawaii, a public holiday honoring the islands' entry into the Union.