1. In 1893, the overthrow of the Hawaiian Kingdom's Queen Liliuokalani took place on January 17, which led to many protests and legal battles. However, one of the key events that allowed for the annexation of Hawaii by the United States was the landing of American troops on July 28 of that year. This date marked the beginning of the occupation of Hawaii by the United States, which would last until Hawaii achieved statehood in 1959.

2. Hawaii's first radio station, KGU, began broadcasting on July 28, 1922. The station was owned by the Hawaiian Electric Company and initially operated at a power of 50 watts. KGU would later become known as KHON and would be the first local station to broadcast a live newscast.

3. Hurricane Flossie hit Hawaii on July 28, 2007. The storm caused widespread damage across the islands, with heavy rainfall and thunderstorms leading to flooding and landslides in some areas. Despite the extensive damage, there were no fatalities reported.

4. On July 28, 2012, the Hawaii State Hospital was fined $200,000 for failing to report the death of a patient to the Department of Health. The patient had died in 2009 as a result of a self-inflicted injury, but the hospital did not report the incident until 2010, violating state law.

5. In 2016, Hawaii became the first state to mandate 100% clean energy by 2045. Governor David Ige signed the bill into law on July 28, 2015, setting the state on a path to reduce its dependence on fossil fuels and address the threat of climate change.