The expression “Glorious Thirty” was coined by the economist Jean Fourastié in 1979, and turned the years 1945–75 into a unified period. This article reviews this period. Firstly, the expression does not match the quintessence of these years: it does not fit the social and cultural changes, and it undeservedly harmonizes fundamentally different events. Far from proceeding from a rigorous historiography, the “Glorious Thirty” results from Fourastié’s nostalgic vision, suiting the expectations of the 1980’s as its consecration testifies. Furthermore, the expression does not correspond to contemporary perceptions: opinion surveys allow us to consider the reception of narratives proposed by pollsters. This article argues that the recognition of this period as a glorious epoch is far from being unanimous. Thus, it would be probably more judicious to not apply this label.