Just some fun facts about today I got from Curious.com you may not have known.

For the over 50 percent of you wearing jeans right now, your pants were patented on this day in 1873. $100 billion worth of jeans are sold every year around the world, with several million pairs made every day. But they didn't become the pant of the people overnight. Jeans were invented by Jacob Davis, a Latvian immigrant who sold provisions to miners in Nevada during and after the Gold Rush. Legend has it that Davis was repeatedly asked by the wives of his miner customers to improve the durability of the pants he sold—their pockets frequently ripped or tore off altogether in the mines. Davis reportedly had his Eureka! moment when looking at a horse's saddle sitting on a shelf, realizing he could use metal rivets to strengthen the corners of the pockets. His new "riveted work pants" were so popular with his customers, he was unable to get enough materials. So he wrote an alternatively-spelled letter to the local dry good store owner: "The secratt of them Pents is the Rivits that I put in those Pockots… I cannot make them up fast enough…" The man's name was Levi Strauss. He and Davis successfully applied for a patent of the invention in 1873, using Strauss' money. Initially the new Levi Strauss company produced two versions: one of indigo-dyed denim cotton, and the other of tan "duck cotton." The blue denim, which concealed stains and became softer and faded with time, proved much more popular. Soon it was the only color option. The popularity of jeans increased a great deal by the time Strauss' patent expired in 1908, but they were only worn by farm and ranch workers until the Great Depression. That's when the "cowboy lifestyle" became romanticized. Then, during World War II, American servicemen began wearing them when off duty. Which set the stage for the youth of the 1950s—led by a denim-wearing James Dean in movies like Rebel Without a Cause—to revolt against their parents by wearing jeans instead of slacks as everyday attire. But it was the bell-bottom wearing hippies of the '70s, and the sexy-Calvin-Klein-ad-loving yuppies of the '80s, who sent demand for jeans into the stratosphere. Since then, it has been the world's most popular pant… still with rivets!
More about this Curio:
Today I Found Out: "When and How Jeans Became Popular"
Smithsonian: "The Origin of Blue Jeans"
History: "1873: Levi Strauss and Jacob Davis receive patent for blue jeans"
Racked: "The Complete History of Blue Jeans, From Miners to Marilyn Monroe"
BBC: "How jeans conquered the world"