Although many studies have described society-wide changes in adult women's care-giving for ageing family members, few have examined how this informal eldercare has changed across care-givers’ lifecourse and the temporal changes across different time periods and birth cohorts. Using a hierarchical age–period–cohort model to disentangle the confounding effects of age, period and cohort, this study examines the lifecourse and temporal changes in women's informal eldercare in China that can be attributed to the processes of ageing and social transformation. It advances understanding of the extent to which urbanisation and education have affected women's care-giving over time. The results reveal positive age, period and cohort effects which, together, indicate that the tradition of xiao (filial piety) is in a stable state or even resurgent. Higher education and urban residency are both positively related to women's care-giving behaviour. As women age, the gap between residency differences in eldercare decreases. This study supports the argument that xiao culture is resilient and resistant to change, and that education can function as an enabler to promote it.