1. In 1883, the Hawaiian Legislature passed a law establishing March 20 as the "Birthday of Kamehameha I" - a day to recognize and honor the first king of Hawaii.

2. On March 20, 1893, Queen Liliuokalani was forced to abdicate the throne when a group of American businessmen and politicians staged a coup and overthrew the Hawaiian Kingdom.

3. On March 20, 1969, the Mauna Kea Observatories were officially dedicated in a ceremony attended by Governor John A. Burns and other dignitaries. The observatories are still in use today and are home to some of the world's most advanced telescopes.

4. In 1980, a severe thunderstorm caused a flash flood in Kalihi Valley on the island of Oahu, resulting in the deaths of 5 people and causing millions of dollars in damage.

5. March 20, 2008 marked the beginning of the Merrie Monarch Festival - a week-long celebration of hula and Hawaiian culture held annually in Hilo, Hawaii. The festival attracts thousands of visitors from around the world and is considered one of the most prestigious hula competitions in the world.