September 11: New Year's Day in the Coptic and the Ethiopian calendars, National Day of Catalonia, Teacher's Day in parts of Latin America.

• 1297 - Scots under William Wallace defeated English troops in the Battle of Stirling Bridge.
• 1857 - Paiutes and Mormon militias killed about 120 California-bound pioneers in a wagon train in the Mountain Meadows massacre.
• 1922 - The British Mandate of Palestine began.
• 1973 - A military coup in Chile headed by Augusto Pinochet overthrew the government of President Salvador Allende.
• 2001 - September 11 attacks: Three passenger airliners were hijacked to destroy the World Trade Center in New York City (pictured) and part of The Pentagon in Washington, D.C.; a fourth aircraft crashed in Pennsylvania. In total, almost 3,000 people were killed.

Recent days: September 10 – September 9 – September 8