The film is set during the 1963-64 school year however a couple of elements are thus anachronistic: First, in early 1964 the history teacher mentions the Charonne subway massacre as having happened the previous year in February when it happened in February 1962 (although this could be seen as the character making the mistake of not taking the New Year into account). Second, an announcement that the price postal stamps is going up from 25 to 30 centimes can be heard on the radio, but this price hike did not occur until 1965.