if u get stuck in a time loop do you still get shabbos every seven iterations or only if the original happened to coincide with it? obviously you wonβt have rosh αΈ₯odesh or chagim because those rely on the moon sightings (or rather, the calculations already made) but like. should you refrain from work every seven iterations even though the rest of the world thinks itβs a weekday? would you daven the shabbat tefillot on those iterations or the weekday ones? what if you meet a friend you havenβt seen in a while before the start of the loop, do you say the bracha every time even though from your perspective it feels like itβs been only a day? and same with the sea, new fruits, etc. what if you bought new clothing right before the loop, can you make a bracha on wearing it only the first subjective time or does it count as new clothing again every loop?
Disagreeing with a bunch of the other respondents about shabbos in a way that agrees with their conclusions.
The time that shabbat happens is not a subjective judgement -- the reason, e.g., we say "m'kadesh haShabbat v'Yisrael v'haZmanim" during kiddush on shabbos-yuntif is that the Chagim are mekadesh THROUGH Bnei Yisrael -- we are the ones who determine and have authority over their time, and the cycle of chagim is set by Jews as a community. Whereas in contrast Shabbat is mekadesh in its own right -- its cycle is part of the universe and is independent of any actions of subjective experience of people.
So e.g., if you did a SINGLE time-loop, you would not keep shabbos a day earlier than everyone else after coming out of it -- existing in the regular flow of time and the world as it is, it would be shabbos for you on the same day it is shabbos for the rest of the world.
Having said that, I would say that being STUCK in a time-loop would be a similar situation to traveling deep above the Arctic Circle, or some other place where the cycle of days no longer functions. In those cases -- well, there's a machloket as to whether you should hold by Jerusalem time or hold by the time of the place you left, for when to make shabbos. But in this case Jerusalem time is inaccessible, so "hold by the place where you left" is the only option. This would be, therefore, "track the hours passing for you and at the time when it would have been shabbos in the place and timeline where you left, you should make shabbos at that time/on that cycle.
Is what I would think the halacha would probably hold.
(And interesting consequence of this argument is that if, while in this time-loop, you traveled to a different timezone, I think the argument would still imply that you should do shabbos by your original timezone, which might be when it is still daylight in the place you are at.)
As always, however, if this is something you need an answer for l'maaseh, don't posken by some random person on the internet and rather consult your local rabbi should you find yourself in this situation.














