Swedish preschool education is, by law, non-confessional. Yet, it is also an educational context within which most children aged 1-5 encounter traditions that carry Christian connotations. This paper explores how two Swedish preschools maintain a balance between keeping education non-confessional and paying attention to the traditions that are associated with the preparation for and celebration of Christmas - Advent. The data consist of ten videotaped observations from two preschools. The data was thematised with the help of Ninian Smarts dimensions of religious and secular worldviews. This way, we could show that the different traditions the two preschools were engaged in during the four weeks before Christmas contributed to a banal reproduction of a holiday season with roots in Lutheran Christianity. At the same time, the preschools contributed to a (re)production of traditions that evoke a national imaginery. Our results show that Advent in Swedish preschools is characterised as a non-confessional task for the institution. Thus, the principle of non-confessionality lives side by side with a banal national religion. Thereby, the Swedish preschool plays an integral part in the banal reproduction of a Swedishness that includes Lutheran Christianity.