1. On April 19, 1775, the American Revolution began in Massachusetts with the Battles of Lexington and Concord. The news of this event would eventually reach Hawaii and inspire the islands' own fight for independence from foreign powers.

2. In 1880, the first official census of the Kingdom of Hawaii was conducted on April 19. The census recorded a total population of 48,735, with the majority being of Asian descent.

3. On April 19, 1943, the United States Navy launched a surprise air raid on Kahului Harbor on the island of Maui. The raid was intended to destroy Japanese ships and submarines that were using the harbor as a base for attacks on Allied convoys. The raid was successful, and no American or Japanese forces were lost.

4. In 1960, Hawaii hosted its first professional golf tournament on April 19, the Hawaiian Open. The tournament was won by Arnold Palmer, who would go on to win it again in 1962 and 1963.

5. On April 19, 1995, the Alfred P. Murrah Federal Building in Oklahoma City was bombed, killing 168 people and injuring hundreds more. In response, Hawaii lowered its flags to half-staff and held a moment of silence to honor the victims.