Follow this carefully:
If the universe were a hard drive (one of several parallel universes), and my world were a program, I’d make two partitions of that universe. Then I’d install my world in it with a code that automatically directs Mondays to the secondary drive while all my Tuesdays to Sundays go to the primary drive. Oh they’ll be parallel worlds, except that my main executable life (Life.exe) and all its .DLL files exist and operate on the main partition where I actually don’t have to live with Mondays
It only needs to be a crash-proof system, that’s all. Because I wouldn’t want to be faced by hundreds of Mondays in a row when the main drive gets corrupted and the only partition that’s working is the second one.