More states in the northern U.S. will have a chance of seeing aurora borealis on Friday, as high-speed winds from a spot on the sun’s surface may affect the Earth’s magnetic field, according to the National Oceanic and Atmospheric Administration.

Today, we might celebrate it by making goo-goo eyes at our partners over a bottle of wine, a plate of spaghetti and a bouquet of roses, but ancient Romans celebrated the day with a fertility festival hundreds of years ago with animal sacrifices and drunken merrymaking.

It is one of the most important celebrations in American culture. It impacts not only the local economy but also the entire continent.