Whipped Cream Cake Day, or Gräddtårtans dag, is observed in Sweden every first Sunday of October. This holiday celebrates the popular whipped cream cake, a layered dessert made with sponge cake and various fillings such as vanilla custard, whipped cream, and fresh fruit. The cake, known as bløtkake in Norway and lagkage in Denmark, is believed to have originated in Norway in the 17th century and gained popularity in Sweden in the early 20th century. While the exact origins of Whipped Cream Cake Day are unclear, it is thought to have been celebrated since at least 2000. Traditionally, people enjoy homemade whipped cream cake on this day, often marking special occasions like birthdays or Midsummer celebrations. The cake is typically decorated with whipped cream and garnished with fruits or nuts, making it a festive treat.