So they lay (generally) every 28 hours and sort of work their way around the clock. So it seems as if they skip a day because they won't lay at night. And some chickens only lay 200 eggs (throw in any number here) a year, so you won't get one from them each day either. Actually, it's a wonder we can even figure any of this out when we have more than one breed and more than one hen...LOL