August 5 is the 217th day of the year in the Gregorian calendar, with 148 days remaining until the end of the year. It is often associated with various historical events, celebrations, and observances around the world. On this day, several notable events have occurred, including the founding of Chicago in 1833 and the first successful test of the atomic bomb in 1945. Additionally, August 5 is recognized as National Watermelon Day in the United States, celebrating the popular summer fruit.