1. In 1872, King Kamehameha V signed a law making March 15th an official public holiday in Hawaii. Known as "Prince Kuhio Day," this day honors the life and legacy of Prince Jonah Kuhio Kalanianaʻole, a visionary leader who helped to bring about important political changes for Native Hawaiians.

2. March 15th, 1946 marked the opening of the first commercial airline service to Hawaii. American Airlines inaugurated the first non-stop service from the mainland United States to Honolulu, beginning a new era of tourism and economic growth for the islands.

3. In 1954, the U.S. government conducted its first nuclear test in the Pacific, code-named "Castle Bravo." The test, which was significantly more powerful than anticipated, resulted in widespread contamination of the surrounding area and had devastating impacts on the health and lives of many Indigenous Marshallese people.

4. March 15th is also the anniversary of the birth of Queen Emma Kalanikaumakaamano Kaleleonālani Naʻea Rooke, one of the most beloved monarchs in Hawaiian history. Born in 1836, Queen Emma was a visionary leader who championed education, healthcare, and social justice reform throughout her lifetime.

5. In 2006, March 15th was designated as "Hawaii Agriculture Day" by lawmakers in the state legislature. This day celebrates the important role of agriculture in Hawaii's economy, culture, and environment, and encourages residents to support local farmers and businesses.