2021 September

September 17: Facts & Historical Events On This Day

Facts & Historic Events That Happened on September 17

September 17th is a special day, as it’s the day we celebrate Locate An Old Friend Day as well as Apple Dumpling Day.

We’ve reached the 260th day of the year. There are 105 days left until the end of the year.

People who were born on September 17th share the Virgo zodiac sign.

You’re in luck today as we have carefully selected some of the most amazing things that ever happened September 17th in years gone by.

Did you know that on this day in 1789, the moon of Saturn, “Mimas,” was discovered? The German-British astronomer William Herschel located it using the famous “Forty-foot Telescope” in Slough, England.

Keep reading for more facts about September 17th in history!

What Happened On September 17 In History?

2019

During the Senate climate crisis task force, climate change activity Greta Thunberg said “You’re not trying hard enough. Sorry”.

Thunberg's speech was met with laughter and a round of applause to which the leader of the Senate task force, Ed Markey vowed "We hear you. We hear what you're saying, and we will redouble our efforts".
1983

Miss America crowned the first black winner to Vanessa Williams in New York City.

1953

Conjoined twins were successfully separated for the first time.

OTD in 1953: Conjoined twins were successfully separated for the first time.
The two girls, Carolyn and Catherine were joined by the spine. They both went on to live full healthy lives.
1939

Finnish long-distance runner Taisto Mäki broke the 10,000-meter world record in 29:52:06.

1872

Inventor Phillip W Pratt obtained the patent for his sprinkler system designed to extinguish fires.

1850

The fourth great fire of San Francisco happened on this day, destroying a considerable portion of the city.

Within the first year of settlers building up San Francisco's city, it experienced multiple fires that caused considerable damage. The wooden structures and fierce winds made the fires spread rapidly. Despite the destruction, settlers continued to rebuild, and many fires occurred in the coming years.
1789

The moon of Saturn “Mimas” was discovered by German-British astronomer William Herschel.

OTD in 1789: The moon of Saturn "Mimas" was discovered by German-British astronomer William Herschel.
1787

39 out of 50 delegates signed the US Constitution and shared it publicly.

1683

Dutch scientist Antonie van Leeuwenhoek declared his discovery of microorganisms to the Royal Society in London.

Although Leeuwenhoek never made an official publication of his findings, he was the first to discover microorganisms and bacteria's existence.
1598

The Dutch expedition captained by Admiral Van Warwyck first sighted Mauritius on this day.

Did you know that on this day, September 17th 1789, the moon of Saturn, "Mimas," was discovered?