The Sims 4: Seasons is a transformative expansion pack that introduces a dynamic weather system and a yearly calendar of four distinct seasons. Your Sims' daily lives are impacted by rain, snow, and extreme heat, requiring them to dress appropriately to avoid getting sick or overheated. The pack adds a robust holiday system, allowing you to celebrate traditional events or create custom festivals with unique activities and decorations. It also introduces the Gardening career, where Sims can become floral designers or botanists to study the local flora as it changes throughout the year.