Well this pretty much ruins my entire weekend before it even gets here. How am I supposed to go out for a night of drinking if I'm not allowed to sleep in? I guess the only option is to start drinking earlier so that I reach my tipping point at about 11 instead of two in the morning. There's other advantages to that as well that I'm sure nobody even thought of. Those late-night/early-morning trips to McDonald's happen earlier which means, you guessed it, no lines. Not only that, but police won't be expecting you to be driving drunk at 11 because what kind of alcoholic gets drunk that early? You, that's who. All in the name of keeping your body in rhythm.
TL;DR Sleeping in disturbs your body's circadian clock making it harder to wake up for work come Monday.
Lie-in at the weekend makes you sleepier during the week [The Telegraph]
Posted by Atkins under Health