The onset of age-related differences in time perception occur late in human life.Research demonstrated that the proposed internal clock slows down and its variation increases as people get old.The general cognitive abilities such as attention and memory decline with age,leading to decline in time perception.Temporal estimation depends on the interaction of multiple brain regions,including regions that are consistently involved in temporal processing(the core networks)and regions that are activated when processing context-dependent information(the context networks).It suggests that time perception depends on the function of "core-context" brain networks.Some neurodegeneration diseases affect the networks.Patients with these diseases showed poor performance in temporal tasks.Within a certain age range,older people could maintain relatively good temporal cognitive function as younger adults through cognitive compensation strategies.Future studies would explore how to slow down aging process by cognitive training as well as brain stimulation techniques.