January 21st is officially International Sweatpants Day as well as National Hug Day.
A meteorite that hit Australia 2.2 billion years ago was announced as Earth's oldest recognized meteorite impact structure.
Li Na became the first Asian-born tennis player to be entered into the International Tennis Hall of Fame.
America's Rocket Lab Electron sent a rocket that uses an electric-filled pump engine into orbit, making it the first of its kind.
Over two million women worldwide marched against Trump's anti-women and offensive slews.
American pop singer Ariana Grande joined YouTube at 13 years old.
American tennis player John McEnroe became the first player to be expelled from the Australian Open.
The iconic DeLorean sports car began production in Northern Ireland.
Hundreds of thousands of Americans who evaded the Vietnam War were pardoned by President Jimmy Carter.
The first Star Trek convention was held in New York City.
The Flag of Quebec was adopted and flown for the first time over the National Assembly of Quebec.
The Mysterious Affair at Styles, by British crime writer Agatha Christie, was published in the UK.
New York City passed a law prohibiting women from smoking in public places.
King of France, Louis XVI, faced gruesome guillotine execution for high treason.
The Power of Symphony by William Hill Brown became the first novel published in America.
A medical paper on smallpox was published in Boston, making it the first medical publication in American history.
