The expression is, “Time flies when you’re having fun.” It is one I’ve heard all my life. But where did it come from? That isn’t at all clear. Its all a part of the The Game of Life–played at our house over the holidays. For example, I found this at https://www.dictionary.com/browse/time-flies: Time passes quickly, as in It’s midnight already? Time flies when you’re having fun, or I guess it’s ten years since I last saw you—how time flies. This idiom was first recorded about 1800 but Shakespeare used a similar phrase, “the swiftest hours, as they flew,” as did AlexanderPope, “swift fly the years.” Others sources trace