If you get up late in the morning on weekends, you must think sleep is very valuable. And if sleep is very valuable, that means we should go to bed early. Because if you go to bed early, you always have the option of sleeping later — that is sleeping more — and getting even more sleep than if you had gone to bed late. (You can’t just shift your sleep into any hours block you want, given the coordination issues.) And if sleep is very valuable, the option to sleep more must be valuable as well. Therefore it’s time to go to bed. Now. Early.
No response was forthcoming. The argument, of course, gets at whether "sleep" or "postponement" enters the utility function as the final good. There are some economic papers on procrastination, but overall postponement, or for that matter its closely allied cousin "preemption," is an understudied topic in economics.