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

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Why allowed on Yom Tov?

According to the Torah, melacha isn't permitted on Yom Tov days except for what is needed for food. I read that certain laws, like carrying, don't apply on these days because they are loosened for ...
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62 views

Can an Israeli work in public on second-day yomtov if there are non-observant Jews around?

Shulchan Aruch says an Israeli Jew who is just visiting non-Israel should not work in public on the second day of Yomtov so long as he is in "yishuv" (and commentaries explain "yishuv yisrael") -- a ...
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1answer
46 views

What is the basis for the ruling that adding to a tent is permissible on Shabbath?

The Gemara in 'Eruving 102a quotes Rav as telling Rav Huna that in order to provide shade for his flock in the daytime on Shabbath yet roll back the cover in the evening for ventilation, all he has to ...
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26 views

Re-planting on Shabbath

If a plant was uprooted, is it considered a Melachah of planting to re-soil it on Shabbath? The simplest example would probably be that a child pulled a plant out of its pot on, or immediately ...
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1answer
279 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 ...
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1answer
86 views

learning non-jewish topics as a creative process

Is 'learning' non-Jewish topics a prohibited creative process on Shabbat? If so, on what grounds is learning Tanakh exempted? I read that the study non-Jewish subjects is banned or frowned upon, and I ...
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3answers
286 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 ...
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1answer
108 views

Borer on Shabbos — Spilling food from a spoon with 2 foods on it

Is the following case a problem of "borer" (separating) on Shabbos? We know there can be "borer" even when dealing with two edible foods, one food that a person does want to eat and the other that ...
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2answers
599 views

Is it permissible to use an umbrella on Shabbat?

Assuming one is inside an eruv which generally permits transferring between domains on Shabbat, may one use an umbrella on Shabbat? If not, why not? Follow-up question: What about other things that ...
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3answers
115 views

Why are Milochos based on the construction of the Mishkan?

If we were to receive all the laws for shabbos at Sinai why then is it the Mishkan to where we direct our attention when it comes to classifying all the things we cannot do on Shabbos? Wasn't the ...
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129 views

What is considered work on the sabath?

I was reading about sabbath observances in modern practice and I found a lot of caution and effort is expended to not work: like, even switching on the lights or lifting things could be considered as ...
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180 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 ...
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1answer
166 views

Going to lectures with overhead projector on shabbat

Is attending public lectures (and looking at the screen) permissible on the Sabbat? Information from a computer is projected onto a movie screen and the lecturer may be using a microphone. The ...
3
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1answer
94 views

Someone who keeps one day Yom Tov Cooking on Chol HaMoed for someone else's Yom Tov Sheini

It says in SA OC Siman 539 Sif 11 (in the Rema) that one may buy things on Chol HaMoed that are needed for the Yom Tov Sheini (of the last days of Yom Tov), which is rabbinic in nature for those ...
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1answer
88 views

Are you permitted to weigh Maror on Pesach night?

Are you permitted to use a mechanical scale to weigh the correct Shiur of Maror on Seder night?
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2answers
480 views

Opening a fridge on Shabbat

There are many problems with using electricity on Shabbat, and many ways to understand those problems. The issue of using a fridge is especially problematic (as explained in depth by Rav Nissan Kaplan ...
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69 views

Making bedikas chometz early — ossur in malacha, eating, learning?

When someone leaves their home within 30 days of Pesach without someone to be bodek it from chometz, they themselves have to be bodek it early (See Siman 436.) In the normal case of bedikas chometz ...
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2answers
226 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 ...
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1answer
176 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 ...
3
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1answer
356 views

How does one own and operate a hotel on Shabbat?

Assume we're talking about a hotel that is open every day of the year. How does someone own and operate a hotel while still keeping the laws of Shabbat? Are there sources that discuss this? An ...
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1answer
208 views

How to respond to a non-Jew who asks to shovel your snow on shabbos?

If a non-Jew asks if he may shovel your snow on shabbos what is the proper halachic response? Does it make a difference if he is asking to do this for pay (not previously arranged before shabbos)?
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1answer
91 views

Refilling a saltshaker on Shabbos

This past Shabbos I was at a house and the saltshaker was empty. I went to refill the saltshaker and a fellow told me I can not reseal the cover as it is considered a Toldah of Boneh. Is this accurate ...
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1answer
110 views

Cutting pills on Shabbos

Assuming your rabbi already permits you to take medicine on Shabbos for a serious chronic disease. If your doctor increases your dosage by half a pill, and the pill is already pre-scored to make it ...
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1answer
168 views

Typing on Shabbos

If one would type on a computer on Shabbos would he be ovar an issur d'oraisa in regards to the malacha of writing? (The other malachos involved aside for a moment.) Is there any room to say this ...
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3answers
181 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 ...
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Reboiling water and reheating chulent on shabbos [duplicate]

Possible Duplicate: Blackout restoration on Shabbath - and your food Last night, after we had all gone to sleep, there was a power outage. From reports in the community, it seems that the ...
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3answers
454 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 ...
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3answers
287 views

Can I light a new fire on yom tov?

If I can transfer a fire, can I light a new fire on yom tov? What's the difference between lighting a new fire and transferring a fire? Aren't they part of the same melacha?? The melacha is to create ...
2
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1answer
91 views

Does “burning” water fall under the Av Melachah of “bishul” on Shabbos?

If water that falls onto a hot plate on Shabbos immediately "burns" up and evaporates, does this fall under the Av Melachah of bishul? (The pracitical application of this I want to leave aside. ...
3
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1answer
206 views

Borer and Grinding on Yom Tov - and other Melachoth that are Ochel Nefesh

Which Melachoth are prohibited on Shabbath but are permissible to perform on Yom Tov because of the exception of Ochel Nefesh? Famously, cooking and carrying in the public domain are allowed, yet ...
5
votes
1answer
191 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 ...
12
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2answers
301 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 ...
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3answers
382 views

Why is braiding hair “building”?

The gemarah in niddah (45) says that when the torah says that God "built" Eve out of the bone of Adam what actually happened is that God braided Eve's hair and presented her to Adam as a wife. This is ...
4
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1answer
103 views

Delousing on Shabbat (- Mishna, Shabbat 1:3)

In the Mishna, Shabbat 1:3, it states (amongst other things) that one should not delouse one's garments by candlelight on Shabbat (ולא יפלה את כליו... לאור הנר). The following mishna, however, states ...
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1answer
120 views

Can you destroy a spider web on Shabbos?

Can you destroy a spider web on shabbos if you simply do not want it around (you consider it unseemly)?
7
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1answer
84 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 ...
4
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1answer
234 views

Ice-cream scoop on Shabbos

Is there anything wrong with using an ice-cream scoop to dish ice-cream on Shabbat? I have been told in the name of a Rebbetzin that you can't.
6
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2answers
214 views

Is one allowed to cut olives or grapes on Shabbos?

On shabbos, it is a biblical prohibition squeeze olives or grapes specifically for their juices, though one may squeeze them if the juices are used directly to enhance a solid food. As an additional ...
9
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1answer
271 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".)
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1answer
432 views

Boiling over a pot to extinguish burners on Yom Tov?

Generally, on Yom Tov one is allowed to light a gas burner (using a pre-existing flame), but is not allowed to turn off the gas burner. This is because one may light a fire on Yom Tov, but not ...
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3answers
809 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?
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72 views

Deliberately planning to do work for the community on Chol HaMoed: Is it allowed?

We are setting up a new (money) Gemach. To register as a charity, a bank account is now needed. We were told of this on Thursday around noon. We were unable (too busy getting ready for Yom Tov) to get ...
5
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2answers
196 views

Combing the beard on Shabbos vs. weekday?

It says here that One is not allowed to use a comb on Shabbos to comb his hair because one will ultimately pull out hair while combing. This is forbidden even if one will only run through the ...
4
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1answer
65 views

Product of Melachah that wasn't really necessary, except that in the end it was

If Melachah was performed on Shabbath, but it was not necessary for the enjoyment of the product of the Melachah, can that product be enjoyed? What if the Melachah was the result of some other ...
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3answers
87 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 ...
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2answers
855 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 ...
6
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2answers
163 views

Opening bottles and creating a Keli on Shabbath

Does opening a new bottle create a new Keli, such that it would be prohibited on Shabbath? (I personally don't think so for a few reasons. However, someone posted this question a little while ago ...
7
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1answer
220 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 ...
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2answers
577 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, ...
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3answers
2k 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, ...