Commonly refers to acts of labor that are forbidden on Shabbos/Yom Tov.

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20
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3k views

Why can't electricity be manipulated on Shabbat?

Why can't we use and change electricity on Shabbat and YomTov? By this I mean why can't we turn on and off lights...? I'v heard Rabbis say that its because you can't complete a circuit on Shabbat, ...
19
votes
6answers
3k views

Is using a Kindle on Shabbat permitted?

A Kindle is an e-book reader that uses "e-ink" rather than an LCD screen. It has physical controls to turn pages. (This question is not about the newer ones with touch screens.) If left unused it ...
19
votes
3answers
645 views

Can I cause a Melacha to happen in a place where Shabbat has already started?

Can I cause a Melacha to happen in a place where Shabbat has already started? For example, if I live in New York, could I send a fax (causing the machine to print a document) to Israel on Friday ...
16
votes
3answers
943 views

Inviting a non-observant Jew on Shabbat or Yom Tov

Can I invite a Jew for a meal on Shabbat or Yom Tov if I know they will drive to my house?
16
votes
2answers
1k views

Bootstrapping problem: havdalah ends shabbat (for one who didn't daven ma'ariv) but lighting the candle is melacha?

This answer to a question about melacha before havdalah notes that in that situation one should say "baruch hamavdil bein kodesh l'chol" first. Does that apply to lighting the havdalah candle? I ...
16
votes
4answers
271 views

May a Katan (minor) perform Melachah (“work”) on Shabbath?

In my experience, I've noticed that many people take for granted that if one needs a Melachah to be performed on Shabbath, one may have a minor, especially one under the age of 3, perform what is ...
13
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4answers
537 views

Typing on Chol Hamoed

Is typing allowed on Chol Hamoed? Does it make a difference if whatever is typed will be printed afterwards?
13
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3answers
562 views

Using Post-its on Shabbos

Is one permitted on Shabbos to use post-it notes or adhesive page flags to mark content in a book for future reference after Shabbos? Would there be an issue with the adhesive or leaving the page ...
12
votes
2answers
434 views

Why does writing on Shabbos need two letters?

In order to transgress "writing" (כותב) on Shabbos, (m'd'oraysah) one must write two letters. (See for example here.) Why is this so? Shouldn't writing anything still be considered writing? For ...
12
votes
3answers
198 views

What if you undo a shabbat melacha?

If you plant a seed shortly before the end of shabbat (zoraya) and then un-bury it after shabbat, or you put an uncooked food into an oven and then take it out within seconds without it having baked ...
12
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2answers
322 views

10th man drove to shul on shabbat

If one of precisely ten men, who form a minyan, had driven to shul (the synagogue) on shabbat, is that an acceptable minyan? I would have though not, since one is benefiting from his melacha on ...
11
votes
3answers
778 views

Shoveling snow on Shabbos

Regardless of snows muktza status on shabbos, is there an issue in shoveling snow from a paved walk? At worst: If snow is muktza, you are doing tiltul min hatzad letzurach davr mutar since you need ...
11
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3answers
514 views

Glow sticks on Shabbos

May one activate a glow stick on Shabbos? (In other words, is there a prohibition on activating the chemical reaction which produces the light in a glow stick?)
11
votes
2answers
658 views

Is there any issue with using aerosols on Shabbos?

I've heard from many people that you shouldn't use aerosols (such as air fresheners, disinfectants or deodorants) on shabbos, usually citing some vague reason of changing the form from liquid to gas, ...
11
votes
3answers
663 views

Tying a Tie on Shabbos

How should one tie a tie on Shabbos (or yom tov) so that it doesn't have any knot problems? In other words there are lots of ways to tie a tie. I was wondering which of these are okay for use on ...
11
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3answers
542 views

What's the deal with showering on yom tov?

What's the deal with showering on yom tov? I am asking not about shabbos, but specifically about yom tov.
11
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1answer
213 views

Is it permitted to use a thermochromic cup on Shabbos?

A novelty cup, see for example here, appears black when cold. When hot liquid is poured into it, the black changes to white and the previously concealed writing (underneath, so to speak) becomes ...
11
votes
2answers
446 views

Lottery on Shabbos

Is one allowed to buy a lottery ticket if the lottery will be held on shabbos? Is it a problem of possibly making money on shabbos even though his chances are slim?
10
votes
1answer
429 views

What constitutes a shinui?

I was recently taught the concept of a shinui to be "something done in a way that is unusual compared to the norm in one's area of residence", with respect to the permissibility of actions done on ...
10
votes
2answers
253 views

Which types of light bulbs are 'only' an issur d'rabbanan to activate on Shabbat

I'd be very interested to know if anyone has definitive advice on which types of light bulbs are considered an issur d'rabbanan (Rabbinic prohibition) vs an issur d'oraita (Torah prohibition) to turn ...
9
votes
3answers
629 views

Non-Yemenites who heat up soup after the start of Shabbat?

The most widely held practice regarding heating up liquids on Shabbat is that it is prohibited, though there are differences of practice between Ashkenazim and Sephardim regarding sauces and such ...
9
votes
1answer
346 views

Making a origami creation on shabbos?

Would it be a violation of one of the thirty-nine melachos if someone made a paper airplane or made origami creation on shabbos? (And I know a melacha is loosely translated as "creative work".)
9
votes
2answers
204 views

Tzoveah on Shabbos

It is going to sound strange but here is the question In the toilet there are these blue things that clean your bathroom with every flush by adding bleach hence it colors the water blue every time you ...
9
votes
1answer
308 views

Hotels, electronic keys, and shabbat

Is it permissible to ask a non-Jewish hotel employee to let you into your hotel room on shabbat if the only way to unlock the hotel room is through the use of an electronic key? It seems like many ...
8
votes
1answer
191 views

Is braiding challah the melacha of weaving?

Oreig (weaving) does not appear to be a permitted melacha on Yom Tov. Braiding is oreig - may one braid challos on Yom Tov? If so, would it follow that one may braid anything on Yom Tov so long as ...
8
votes
3answers
1k views

Do you have to close your blog / website on shabbos?

Do you have to close your blog on shabbos?
8
votes
2answers
1k views

Blowing bubbles on Shabbos

Is there any halachik problem with blowing bubbles on Shabbos? If so what melacha categories does it fall under? Does the age of the blower matter?
8
votes
3answers
272 views

Ask a friend to carry on Shabbos

Suppose there are two friends: one holds of the eiruv and the other doesn't. Is the second allowed to ask the first to carry for him? And if the first anyways carried it, can the second benefit from ...
8
votes
1answer
278 views

Shaking a no-battery flashlight on Shabbos

What is the problem with shaking one of the no battery/shaking flashlights which is on on shabbos?
8
votes
3answers
890 views

Where does the concept of a Kli Shlishi come from?

When it comes to cooking on Shabbos, most people hold that things that are not allowed to be put in a Kli Sheni (a vessel once removed from the vessel that was on the fire) because it is considered ...
8
votes
1answer
391 views

Cocktail mixing (shaking & straining) on Shabbos

Is one allowed to use a shaker to strain an alcoholic drink on Shabbos? I have been told that it is mutar to use a pitcher with an ice guard on Shabbos, but I do not know the reason why this is not ...
7
votes
5answers
677 views

malacha from child

is one allowed to ask a child to do a malacha of shabbos? does your answer also apply to a non-Jew?
7
votes
3answers
409 views

Can you leave video chat on over Shabbos?

Basically: Can you leave your computer with video chat on (to another person) on over shabbos? And what if there's also audio? For example a relative in the hospital, relatives that in a far away ...
7
votes
1answer
316 views

Does the Biblical prohibition against writing on Shabbat apply to nonsense as well?

Writing (כותב) is one of the 39 melachot (forbidden labors) of Shabbat. Writing nonsense is forbidden regardless, but i'm curious whether it's a Biblical or Rabbinic prohibition. On a Biblical ...
7
votes
1answer
92 views

Heating non-food items on Shabbath

Is it permissible to heat non-food items on Shabbath? Assume the method of heating is to use an existing heat source (a blech, or the top of a crockpot or hot water urn). Would it matter if it is ...
7
votes
3answers
92 views

Melachah on Shabbath - after Shabbath

If Melachah was done on Shabbath, can the product of that Melachah be enjoyed after Shabbath, and if so, under what criteria (does it depend on how long after Shabbath, or on the need, or something ...
7
votes
2answers
213 views

Is using a book with letters stamped on the sides melacha (erasing) if the book wasn't closed in the first place?

A comment on this question points to the following from OU: Likewise, when words are stamped on the edge of a book (as is the case with most library books), these letters are separated when the ...
7
votes
3answers
354 views

Difference between Pesik Reshe Delo Niha Le, Pesik Reshe Delo Ichpat Le, & Melacha She'en Sarich LeGufa

What is the practical difference between actions considered Pesik Reshe Delo Niha Le, Pesik Reshe Delo Ichpat Le, and Melecha She'en Sarich Legufa? What is an example that can demonstrate the ...
7
votes
1answer
233 views

Should separating pull apart Challah rolls be considered a forbidden act of completion?

I have heard many people state that using Challah* rolls that are baked in one unit to be pulled apart might be a problem for making Leḥem** Mishneh on Shabbath. In fact, there are rolls that are sold ...
7
votes
1answer
532 views

Asking Questions on StackOverflow on Erev Shabbos

Is there a problem with asking a programming question on StackOverflow (or any other StackExchange site) on Erev Shabbos, so that they will eventually be answered by the time Motzei Shabbos arrives? ...
7
votes
1answer
81 views

Is there a problem of image projection on Shabbat?

There are night lights which don't just emit light but project an entire image (example). If such a device is plugged in before Shabbat, would there be a problem of closing window shades or doing ...
6
votes
1answer
226 views

Why do all people disappear on Saturday at mi.yodeya, is this considered work?

I understand Saturday is sabath but mi.yodeya is a site for jewish learning and nothing related to work , so why do people disappear from here on Saturdays? Does answering questions or questing etc ...
6
votes
2answers
111 views

How exactly was extinguishing used constructively to build the Mishkan/Tabernacle?

One of the 39 categories of forbidden labor on Shabbos is "extinguishing" (mechabeh); how exactly was it used in a constructive fashion when building the Mishkan?
6
votes
2answers
419 views

Laws regarding putting someone to death for violating the sabbath

Two witnesses go to the beit din and claim that so and so violated the sabbath on a biblical level. The witnesses claim they warned him in accordance with the rules and they did their part as ...
6
votes
1answer
277 views

Melacha on Shabbat - At which stage of removal does something become legal?

I had heard of something relating to melacha on Shabbat from an (orthodox!) rabbi who mentioned something really interesting. At a certain level of removal, one can indirectly perform melacha. It was ...
6
votes
1answer
276 views

Benefiting from work done by a non-observant Jew after Shabbat

Observant Jews do not resume doing melacha after Shabbat until after Havdalah. But not all Jews do this. So may you benefit from work done by a non-observant Jew after Shabbat ends, even if he did not ...
6
votes
2answers
487 views

Can a Jew who is keeping the Shabbat rules ask another Jew who is not keeping shabbat to turn on/off the lights? [duplicate]

The situation is that I am currently living in dorm rooms with a Jewish person who has decided to keep Shabbat. I am a Jew who does not keep Shabbat, but I respect my dorm mate and do not want to ...
6
votes
2answers
117 views

Why was the man in Numbers 15 put to death?

Once, when the Israelites were in the wilderness, they came upon a man gathering wood on the Sabbath day. Those who found him as he was gathering wood brought him before Moses, Aaron, and the whole ...
6
votes
1answer
267 views

Inflatable Mattress on Shabbos

Is one allowed to pump air into an inflatable mattress on Shabbos? Is this a problem of tikkun cli, makeh b'patish, etc? (Or any other problem.) What about if the mattress was inflated Erev Shabbos ...
6
votes
1answer
162 views

Jello (Gelatin) on Shabbos

Is making Gelatin on Shabbos permissible?