a martian day is called a "sol", and is a little longer than an earth day. mars rotates in 24 hours and 37 minutes. it rotates on a tilted axis, just like the earth does, so it has four different seasons. of all the planets in the solar system, the seasons of mars are the most earth-like, due to their similar axial tilt. the lengths of the martian seasons are almost twice those of earth's, as mars's greater distance from the sun leads to the martian year being almost two earth years long.