All of these tasks are prohibited, as well as any task that operates by the same principle or has the same purpose. In addition, the rabbis have prohibited handling any implement that is intended to perform one of the above purposes (for example, a hammer, a pencil or a match) unless the tool is needed for a permitted purpose (using a hammer to crack nuts when nothing else is available) or needs to be moved to do something permitted (moving a pencil that is sitting on a prayer book), or in certain other limited circumstances. Objects that may not be handled on Shabbat are referred to as "muktzeh," which means, "that which is set aside," because you set it aside (and don't use it unnecessarily) on Shabbat.
The rabbis have also prohibited travel, buying and selling, and other weekday tasks that would interfere with the spirit of Shabbat. The use of electricity is prohibited because it serves the same function as fire or some of the other prohibitions, or because it is technically considered to be "fire."
The issue of the use of an automobile on Shabbat, so often argued by non-observant Jews, is not really an issue at all for observant Jews. The automobile is powered by an internal combustion engine, which operates by burning gasoline and oil, a clear violation of the Torah prohibition against kindling a fire. In addition, the movement of the car would constitute transporting an object in the public domain, another violation of a Torah prohibition, and in all likelihood the car would be used to travel a distance greater than that permitted by rabbinical prohibitions. For all these reasons, and many more, the use of an automobile on Shabbat is clearly not permitted.
Shabbat, like all Jewish days, begins at sunset, because in the story of creation in Genesis Ch. 1, you will notice that it says, "And there was evening, and there was morning, one day." From this, we infer that a day begins with evening, that is, sunset. For the precise time when Shabbat begins and ends in your area, consult the list of candle lighting times provided by the Orthodox Union, by Chabad or by any Jewish calendar.
Shabbat candles are lit and a blessing is recited no later than eighteen minutes before sunset. This ritual, performed by the woman of the house, officially marks the beginning of Shabbat. Two candles are lit, representing the two commandments: zakhor (remember) and shamor (observe), discussed above.
The family then attends a brief evening service (45 minutes - that's brief by Jewish standards - see Jewish Liturgy).
After services, the family comes home for a festive, leisurely dinner. Before dinner, the man of the house recites Kiddush, a prayer over wine sanctifying Shabbat. The usual prayer for eating bread is recited over two loaves of challah, a sweet, eggy bread shaped in a braid. The family then eats dinner. Although there are no specific requirements or customs regarding what to eat, meals are generally stewed or slow cooked items, because of the prohibition against cooking during Shabbat. (Things that are mostly cooked before Shabbat and then reheated or kept warm are OK).
After dinner, the birkat ha-mazon (grace after meals) is recited. Although this is done every day, on Shabbat, it is done in a leisurely manner with many upbeat tunes.
By the time all of this is completed, it may be 9PM or later. The family has an hour or two to talk or study Torah, and then go to sleep.
The next morning Shabbat services begin around 9AM and continue until about noon. After services, the family says kiddush again and has another leisurely, festive meal. A typical afternoon meal is cholent, a very slowly cooked stew. My recipe is below. By the time birkat ha-mazon is done, it is about 2PM. The family studies Torah for a while, talks, takes an afternoon walk, plays some checkers, or engages in other leisure activities. A short afternoon nap is not uncommon. It is traditional to have a third meal before Shabbat is over. This is usually a light meal in the late afternoon.
Shabbat ends at nightfall, when three stars are visible, approximately 40 minutes after sunset. At the conclusion of Shabbat, the family performs a concluding ritual called Havdalah (separation, division). Blessings are recited over wine, spices and candles. Then a blessing is recited regarding the division between the sacred and the secular, between Shabbat and the working days, etc. For details, see Havdalah Home Ritual.
As you can see, Shabbat is a very full day when it is properly observed, and very relaxing. You really don't miss being unable to turn on the TV, drive a car or go shopping.
http://www.jewfaq.org/shabbat.htm
Does Bob keep the Sabbath? It is very doubtful.
