Imagine, if you can, a planet that does not have rotation axis tilted to its orbit. Perhaps it is change itself that most deserves our revelry, for we are creatures of change. The best things we do, from birth to death, result in changes for ourselves and others. All ebb and flow, and every shape that's born bears in its womb the seeds of change. During the spring, the days are warm in middle parts of the Northern Hemisphere, the northern half of the earth.
Summer follows with hot days and warm nights.
In autumn, the days become cooler, leading to the cold of winter. The four periods are called climatic seasons when based on these temperature and weather changes. In the Southern Hemisphere, the climatic seasons differ by about six months. This hemisphere has summer when the Northern Hemisphere has winter. The seasons change because places on the Earth receive different amounts of sunlight throughout the year.