People are posting "2 sleeps till Christmas!" But really you can have as many sleeps as you want over the next 24 hours there's no rule
@byroncclark "Sleep" is such a coarse grained concept. I prefer to think in terms of nanosleeps.

@FenTiger @byroncclark I like to go for a continuous state of active tiredness that has all the no-use-to-anyone aspects of sleep but none of the restoring-energy-to-face-the-next-day-with-renewed-vigour aspects.

There are many fine choices.