The calendar year is divided into four distinct periods, each characterized by specific climate patterns and durations. These periods, traditionally recognized as spring, summer, autumn, and winter, are marked by the Earth’s orbit around the sun and its axial tilt. Each division typically spans a three-month interval, resulting in a cyclical progression of environmental conditions. As an illustration, the period generally associated with warmer temperatures and longer daylight hours follows the period of increasing temperatures and precedes the period of decreasing temperatures and shorter daylight hours.
Understanding the temporal boundaries of these periods provides a framework for agricultural planning, ecological studies, and various economic activities. Historically, societies have relied on knowledge of seasonal shifts to optimize crop planting, resource management, and preparation for varying weather conditions. This cyclical pattern influences biodiversity, migratory patterns of animals, and the overall rhythm of life across the globe. Accurate identification of these temporal boundaries is crucial for effective planning and resource allocation.
Subsequent sections will delve into the specific temporal ranges typically associated with each of these periods in the Northern and Southern Hemispheres, along with exploring the scientific underpinnings that dictate the length and characteristics of each division.
