April 28 is the 118th day of the year in the Gregorian calendar, with 247 days remaining until the end of the year. It is often associated with the arrival of spring in the Northern Hemisphere, bringing warmer weather and blooming flowers. Several notable events have occurred on this date throughout history. For example, in 1967, Muhammad Ali refused induction into the U.S. Army, citing his religious beliefs and opposition to the Vietnam War. Additionally, April 28 is recognized as National Superhero Day in the United States, celebrating the contributions of superheroes in popular culture.