September 21 is the 264th day of the year (265th in leap years) in the Gregorian calendar; 101 days remain until the end of the year.

2012年9月21日 · Historical events for the 21st of September. See what famous, interesting and notable events happened throughout history on September 21.

On This Day In History - September 21: anniversaries, birthdays, major events, and time capsules. This day's facts in the arts, politics, and sciences.

2012年9月21日 · Abolition of the French monarchy, People's Republic of China proclaimed, a wooly record and other important events, birthdays and deaths from September 21.

Discover what happened on September 21 with HISTORY's summaries of major events, anniversaries, famous births and notable deaths.

2020年9月21日 · The International Day of Peace (or World Peace Day) celebrated annually on September 21 is devoted to strengthening the ideals of peace, both within and among all nations and peoples. At a time when war and violence often monopolize our news cycles, the International Day of Peace is an inspiring reminder of what we can create together.

2020年9月20日 · In honor of the ceremonious occasion, here are 12 memorable things that have happened on September 21st. After reading them, not only will you remember the 21st night of September—you’ll remember...

2023年6月20日 · On September 21st, important events like the declaration of the First French Republic and the discovery of Neptune took place, showcasing the breadth of human accomplishments in politics and science. 1792: The National Convention declares the First French Republic. 1915: Stonehenge is sold at an auction to Mr. Cecil Chubb.

September 21 is the 264th day of the year (265th in leap years) in the Gregorian calendar. There are 101 days remaining until the end of the year. 1217 – Livonian Crusade: Estonian tribal leader Lembitu and Livonian tribal leader Kaupo are killed in the Battle of St. Matthew's Day.

September 21st is Escapology Day and International Day of Peace. We’ve made it to the 264 th day of the year! There are 101 days remaining in 2025. This day in history was a very important one in many areas including construction, inventions, literature, independence and so much more.