Given that a Parsec is a unit of distance, rather than time, quite what Han Solo meant by bragging about the Falcon’s ability isn’t clear. Was he just bullsh*tting? Was he bragging about how tight he could run the Falcon to the edge of the run? Was he just wrong? Was it just a script error that no one bothered correcting? Does it matter? The Millennium Falcon rocks regardless of this useless piece of information, which is why we put it on a T-shirt.