1870
Sisters Victoria Woodhull and Tennessee Clafin open the first woman-owned brokerage firm in the United States.
National days, ongoing national weeks and months, and global observances for January 20, 2026. Plus historical events and birthdays.
January 20, 2026 celebrates National Cheese Lover's Day, plus 2 more.
Read the full story →Events that occurred on January 20 throughout history
Sisters Victoria Woodhull and Tennessee Clafin open the first woman-owned brokerage firm in the United States.
The United States Senate amends and extends the 1875 reciprocity treaty with Hawaii securing a lease to Pearl Harbor as a Naval Base.
Irwin W. Cox registers the trademark for the steel-wool product called "SOS." The initialism for the shaved steel wool saturated with soap stood for "Save Our Saucepans."
The Wisconsin Cheese Foundation sponsors the making of the world's largest block of cheese ever made. At midnight, the process began at Steve's Cheese in a factory near Denmark, Wisconsin.
Researchers at the University of Massachusetts and Advanced Cell Technology announced the successful cloning of calves that may have produced medicinal milk.
Longer-running observances that include this date.
World Health Esteem Month
Month
National Store Brands Month
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National Hobby Month
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National Hot Tea Month
Month
National Cbd Month
Month
National Slavery And Human Trafficking Prevention Month
Month
National Blood Donor Month
Month
National Menudo Month
Month
National Black Diamond Month
Month
National Bath Safety Month
Month
National Mentoring Month
Month
Showing the first 12 — See all months for January.
