Discover What Happened Today in History
The Julian calendar, introduced by Julius Caesar, came into force, reforming the Roman calendar. It established a 365-day year with a leap day every four years, forming the basis for the modern Gregorian calendar.
Italian astronomer Giuseppe Piazzi discovered the dwarf planet Ceres, the first and largest object in the asteroid belt between Mars and Jupiter. This discovery expanded the known boundaries of the solar system.
Haiti declared independence from France, becoming the world's first black-led republic and the first independent Caribbean state. This followed a successful slave revolt led by Jean-Jacques Dessalines.
U.S. President Abraham Lincoln's Emancipation Proclamation legally came into force, declaring all enslaved people in Confederate states to be forever free. This transformed the Civil War into a fight for human liberty.
The Ellis Island immigration station in New York Harbor opened, processing over 12 million immigrants to the United States over the next 62 years. It became a iconic symbol of American immigration.
The six British colonies of New South Wales, Victoria, Queensland, South Australia, Western Australia, and Tasmania federated, forming the Commonwealth of Australia. Edmund Barton became the first Prime Minister.