All planets orbiting stars, or satellites of planets, will experience day and night alternation on their surfaces if their rotation periods differ from their orbital periods around stars. Day represents light, and night represents darkness. The word "time" used to describe the passage of time originates from this. The moon takes a year to orbit the Earth around the Sun, while its rotation period is one month. Therefore, the moon experiences day and night alternation, with half a month being daytime and half a month being nighttime. During the day, it's extremely hot, with temperatures reaching up to 127°C; at night, it's extremely cold, with temperatures dropping as low as -183°C.
The reason why planets or satellites have seasons is firstly due to their orbital motion around the Sun, and secondly because the axis of their rotation is not perpendicular to the plane of their orbital path. For example, the Earth's axis of rotation is tilted at an angle of about 23.5°. From June to September, sunlight directly shines on the Northern Hemisphere, so the Northern Hemisphere experiences longer days and shorter nights, with hot weather; while from December to March, sunlight directly shines on the Southern Hemisphere, and the Northern Hemisphere experiences shorter days and longer nights, with cold weather. The situation is reversed in the Southern Hemisphere. If the Earth's axis of rotation were not tilted, even if it orbited the Sun, there would be no change in the seasons. Although people could measure the orbital period based on the changes in the stars, they would not experience the alternation of seasons, the passage of time, or the monotonous cycle of day and night. Mars, Saturn, and Neptune are similar to the Earth in this regard. Mercury, Venus, and Jupiter have almost no tilt in their axes of rotation, so they also do not experience seasons. The moon's axis of rotation is nearly perpendicular to the plane of its orbital path around the Earth, so the moon also experiences day and night alternation, but there is no change in seasons even though it takes a year to orbit the Earth.

