Which is longer, a light year or a calendar year?

A light year is actually a measure of distance that represents how far light travels in one year, which is approximately 5.88 trillion miles or about 9.46 trillion kilometers. In contrast, a calendar year is a way to measure time, specifically the period it takes for the Earth to complete one orbit around the Sun, which is about 365.25 days. Since the two measurements are fundamentally different—one being a measure of distance and the other a measure of time—they cannot be directly compared in terms of length. Therefore, saying that neither is longer is accurate because they are not comparable in that context.