March 4 is the 63rd day of the year in the Gregorian calendar, with 302 days remaining until the end of the year. It is known for various historical events, including the inauguration of U.S. presidents before the 20th Amendment moved the date to January 20. In addition to its historical significance, March 4 is also recognized as National Grammar Day in the United States, celebrating the importance of proper grammar in communication. Various cultural events and observances may take place on this day, highlighting its significance in different contexts.