September 11 (or 12 in a leap year)

September 11 (or September 12 in a leap year) is notable for several reasons. In the United States, it commemorates the terrorist attacks in 2001 when hijackers crashed planes into the World Trade Center in New York City and the Pentagon, resulting in nearly 3,000 deaths. This day is marked by remembrance ceremonies honoring victims and first responders. Additionally, the date has historical significance in various cultures, often associated with harvest festivals or significant events. Overall, September 11 serves as a reminder of the impact of global events on society and the importance of unity and resilience.