A weekend lie-in can affect mood and INCREASE risk of depression
Daily Mail
Experts from the Michigan Medicine, the University of Michigan's academic medical centre used sleep and mood data from 2,1000 early career doctors taken over a year.
https://www.dailymail.co.uk/sciencetech/article-9275211/Changing-time-wake-affect-mood-increase-risk-depression.html?ns_mchannel=rss&ns_campaign=1490&ito=1490