The discussion revolves around the relationship between time and the speed of light, with the original poster questioning if they are linked. It is clarified that speed is a measure of distance over time, making the concept of "speed of time" nonsensical. Participants explain that light always travels at a constant speed (c) in a vacuum, while the expansion of the universe is accelerating and affects how light travels across distances. The conversation also touches on time dilation and the distinction between coordinate time and proper time in relativity. Ultimately, the complexities of these concepts highlight the challenges in understanding the nature of time and light in the context of modern physics.