Hooray if you’re a morning lark because your natural sleep habits, or circadian rhythms, are aligned with traditional 8 to 5 work schedules and school drop-off times.But it’s a bummer if you’re a night owl, primed to perform better in the afternoon and evening and stay up late, according to a new study published Monday in the journal Molecular Psychiatry.The study used sleep data gathered from wrist activity monitors worn by more than 85,000 participants of the UK Biobank Study,