When you are near the end of the month and you realize you have a huge amount of bandwidth allotted to you by your ISP that doesn't rollover to the next billing cycle. You decide to use it all up before the next billing cycle.
Dan: "Hey Fred, what you are doing this weekend"?
Fred: "I gotta do a bandwidth binge this weekend. I still have 100 gigs of bandwidth that I must use up before the next billing cycle that starts on Monday. Comcast doesn't rollover your unused data to the next month."
Dan: "You must be in Atlanta GA then".
Fred: Nope! I am in Nashville TN."