Lördagsgodis
Lördagsgodis ( or "Saturday candy") is a Swedish tradition of children eating candy or sweets mainly or only on Saturdays. The tradition started as a health recommendation in 1959 following the government-funded Vipeholm experiments, where patients of Vipeholm Hospital for the intellectually disabled in Lund, Sweden, were unknowingly fed large amounts of sweets to see whether a high-sugar diet would cause tooth decay. Over time, what was once a recommendation has turned into a routine for both children and adults to eat candy on Saturdays, as an event to look forward to during the week. It is common for Swedes to buy lördagsgodis by weight from candy walls in grocery stores. References 

Culture of Sweden
Saturday
Candy