"In Sweden, Walpurgis Night (Swedish: Valborgsmässoafton or simply Valborg) has more or less become a de facto half holiday. The forms of celebration in Sweden vary in different parts of the country and between different cities. Sir James George Frazer in The Golden Bough writes, "The first of May is a great popular festival in the more midland and southern parts of Sweden. On the eve of the festival, huge bonfires, which should be lighted by striking two flints together, blaze on all the hills and knolls." One of the main traditions in Sweden is to light large bonfires, a custom that is most firmly established in Svealand and may have begun in Uppland during the 18th century: "At Walpurgis (Valborg), farm animals were let out to graze, and ever since the early 18th century bonfires (majbrasor, kasar) have been lit to scare away predators."  In Southern Sweden, an older tradition, no longer practised, was for the younger people to collect greenery and branches from the woods at twilight, these were used to adorn the houses of the village. The expected reward for this task was to be paid in eggs.
Singing traditional songs of spring is widespread throughout the country. The songs are mostly from the 19th century and were spread by students' spring festivities. The strongest and most traditional spring festivities are also found in the old university cities, such as Uppsala and Lund, where undergraduates, graduates and alumni gather at events that last most of the day from early morning to late night on 30 April, or sista april ("The Last Day Of April") as it is called in Lund. More modern Valborg celebrations, particularly among Uppsala students, oftentimes consist of enjoying a breakfast including champagne and strawberries. During the day, people gather in parks, drink considerable amounts of alcoholic beverages, barbecue and generally enjoy the weather, if it happens to be favourable.
In Uppsala, since the mid-1970s, students also go rafting on Fyrisån through the centre of town with home-made, in fact quite easily wreckable, and often humorously decorated rafts. Several nations also hold "Champagne Races", where students go to drink and spray champagne or somewhat more modestly priced sparkling wine on each other. The walls and floors of the old nation buildings are covered in plastic for this occasion, as the champagne is poured around recklessly and sometimes spilled enough to wade in. Spraying champagne is, however, a fairly recent addition to the Champagne Race. The name derives from the students running down the downhill slope from the Carolina Rediviva library, toward the Student Nations, to drink champagne.
In Linköping, the students and public gather at the courtyard of Linköping Castle. Spring songs are sung by the Linköping University Male Voice Choir, and speeches are made by representatives of the students and the university teachers.
In Gothenburg, the carnival parade, The Cortège, which has been held since 1909 by the students at Chalmers University of Technology, is an important part of the celebration. It is seen by around 250,000 people each year. Another major event is the gathering of students in Trädgårdsföreningen to listen to student choirs, orchestras and speeches. An important part of the gathering is the ceremonial donning of the student cap, which stems from the time when students wore their caps daily and switched from black winter cap to white summer cap.
In Landskrona, people gather at the Citadel to play beer-brännboll, a game in which one drinks beer and plays brännboll at the same time."