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Planets orbit the Sun while moons orbit around planets. The amount of time required for a planet or moon to complete one orbit around another body is called an orbital period. On Earth, we call this orbital period a year. Our year is 365.256 days. On Mars it takes 686.98 days (Earth days, that is) to complete one orbit about the Sun--that's a long time to wait between birthdays!
25 earth days to go around the sun's circumference and return to the place from where it started. Whereas as we head towards the poles, the rate of rotation (the speed) decreases and it takes about 35 days for a spot near the poles to cover the distance around the sun. You can also find similar rotation(differential rotation) in gas Giants like Jupiter .