After the plaster has set, the leaf may be removed. Virtually every living thing is affected by the seasons. Farmers plant and harvest their crops in the warm months and mend fences and tend their livestock and machinery in the winter. As the seasons change, people wear heavier or lighter clothing and eat different foods. The seasons are still known by the names that dimly reveal primitive peoples' feelings about them.
Spring refers to the springing forth of living things.
The original meanings of summer and autumn are lost. For the most part, the four seasons are recognized only in the world's middle latitudes. In tropical regions hot, humid months alternate with cool, dry months. Before the calendar, people looked to the sky for signs that a new season was approaching. Such knowledge was vital to determine planting and harvesting times.