Yes, Australia does celebrate Christmas in the summer season. In fact, Christmas in Australia is celebrated during the summer months of December and January. While some countries in the Northern Hemisphere experience winter during the Christmas season, Australia enjoys warm weather and sunny days. Christmas in Australia often involves outdoor activities, such as barbecues, beach trips, and swimming, in addition to traditional Christmas decorations, food, and activities like gift-giving and Santa Claus visits. It's a unique and vibrant celebration of Christmas that reflects the Australian culture and lifestyle.