The NFL playoff game between the Kansas City Chiefs and Miami Dolphins made history—and not just because it was so cold that one head coach’s mustache formed icicles.

The Wild Card game, which aired on the streaming service Peacock, was the most streamed U.S. event ever, drawing 23 million viewers, according to Comcast NBCUniversal, Peacock’s owner. It also was the largest event ever for internet usage in the U.S., accounting for 30% of web traffic, making Saturday the single highest day of U.S. internet usage in history.