"Work intensity is of central importance for organisational perfor- mance, as well as workers' health and well‐being, yet its determi- nants at the workplace‐level remain underresearched. This article addresses this gap by examining consequences of working time adjustments for work intensity and the role of control over scheduling in influencing when working time adjustments have stronger effect on work intensity. Working hours are analysed on three dimensions: duration, distribution and flexibility. Analysis uses the European Working Conditions Survey (2005–2015) and a sample of employees from EU28 countries. Findings reveal that work intensity is closely related to the timing of work. Working long days or weeks, at night, on weekends, and with changes in hours imposed by employers is associated with more intense work. Moreover, the impact of non‐ standard hours on work intensity differs depending on who (workers or employers) has control over their scheduling.”

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