The seasons on any planet change for three reasons:
1) the revolution of the planet around the Sun;
2) the inclination of the axis of rotation to the plane of the orbit;
3) maintaining the direction of the axis of rotation in space.
Mars satisfies these requirements, and, therefore, the seasons change on it, which is recorded by astronomical observations.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.