Struggling to remember something? Scientists claim forgetfulness might depend on the time of day

Daily Mail - Science & tech 

Forgetful people who struggle to remember something should wait till later in the day, according to results from a new study. Research by the University of Tokyo has found memory is worse in the morning or just after waking up. Their study pinpointed a gene in mice that seems to influence memory recall at different times of day and tracked how it causes mice to be more forgetful just before they normally wake up. Study leader Professor Satoshi Kida, of the University of Tokyo, said: 'We may have identified the first gene in mice specific to memory retrieval.' The team believes the internal clock in mammals that is responsible for regulating sleep-wake cycles also affects learning and memory formation.