when was the rubik's cube invented

The Rubik's Cube was invented on May 19, 1974, by Hungarian professor Ernő Rubik. He initially called it the "Magic Cube" and created it as a tool to help his students understand three-dimensional problems. It took him about a month to solve the puzzle himself after invention. The cube was patented in 1975 and first released in toy shops in Budapest in late 1977 before becoming internationally popular as the Rubik’s Cube in 1980.