1. In 1864, Lunalilo became the first elected native Hawaiian king. He was chosen by the legislature and served a brief reign, but was celebrated for his efforts to improve education and healthcare for the Hawaiian people.

2. On November 15, 1912, the first airplane arrived in Hawaii. It was piloted by a U.S. Army lieutenant and landed on a makeshift runway in a sugar cane field. The flight was hailed as a breakthrough in aviation and paved the way for future air travel in the islands.

3. In 1959, Hawaii officially became the 50th state of the United States of America. This historic event was celebrated on August 21st of that year, but November 15th marks the anniversary of Hawaii’s entry into the union.

4. The Mauna Loa Observatory, located on the Big Island of Hawaii, began recording atmospheric carbon dioxide levels on November 15, 1957. This data has become a crucial tool in understanding the effects of human activity on the environment and climate change.

5. On November 15, 1984, the USS Missouri was commissioned at Pearl Harbor. The battleship played a crucial role in World War II and was the site of Japan's surrender to the Allies in 1945. Its final mission was to participate in the Gulf War in 1991 before it was decommissioned a year later. Today, the Missouri is a museum ship open to the public.