Today’s time experience seems to be the subject of unease. Work is intensifying, the general speeding up creates a sense of time scarcity, rhythms collide and the future appears less predictable. Starting from the premise that time as a subject of questioning and difficulties is not historically new, the enquiry seeks to understand its contemporary distinctiveness. The overall hypothesis is that the modern idea of time as subject and tool of management and control has taken a subjective turn: individuals are considered responsible and capable of their personal time experience and organization. On the basis of a qualitative survey on prescriptive practices of time management, the PhD develops what the idea of mastering one’s time means concretely and culturally. It suggests considering how this narrative emplots the way we think our time cultures, usually described through the lens of the social acceleration thesis.