1. The Hawaiian Sovereignty Restoration Day is celebrated on February 28. It is a day that recognizes the historic significance of the Kingdom of Hawaii being overthrown in 1893, leading to the annexation by the United States in 1898. The day is commemorated with events, protests, and educational activities throughout Hawaii.

2. On February 28, 1825, the first printing press arrived in Hawaii. It was brought by American missionaries who wanted to spread Christianity and literacy among the people. The press was used to print the first Hawaiian-language newspaper, Ka Lama Hawaii, which helped promote literacy and education among the indigenous population.

3. February 28, 1947, marks the birth of R. Keao NeSmith, a prominent Hawaiian historian and author. His books and articles have contributed to the revival of traditional Hawaiian culture, language, and practices. He has been honored with numerous awards and recognitions for his work in preserving Hawaiian heritage.

4. In 1943, on February 28, the Battle of the Komandorski Islands took place off the coast of Alaska, where the Japanese Navy tried to attack the American fleet during World War II. The battle resulted in a strategic victory for the United States, as the Japanese were forced to retreat.

5. On February 28, 1917, the USS Arizona, one of the most famous battleships in American history and a symbol of the US Navy's power, was launched in Brooklyn, New York. It would later become infamous for its destruction during the attack on Pearl Harbor on December 7, 1941, where it suffered a catastrophic explosion that killed over 1,100 sailors and Marines. Today, the USS Arizona Memorial is one of Hawaii's top tourist attractions.