This paper explains how the spread of Covid-19 in early-2020 led to containment measures throughout Europe, including a legally enforced lockdown in the UK from 23 March which closed most out-of-home leisure provisions. Time use evidence is then used to show how lockdown led to an abrupt, unprecedented in scale, increase in residual 'leisure' time, and how this was distributed and used among males and females, in different age groups. The immediate lessons for leisure studies have been to endorse claims that leisure activities promote well-being, that loss of social connections at work and leisure weakens macro-solidarity, and that the importance of leisure provisions in modern economies. Experiences during the lockdown, and difficulties in existing, then clarify exactly which leisure matters most, for whom, and why.