Hachana: Difference between revisions

# One may not prepare from [[Shabbat]] or [[Yom Tov]] to a weekday, a [[Yom Tov]] to Chol HaMoed, a [[Yom Tov]] to [[Shabbat]], a [[Shabbat]] to [[Yom Tov]], from one day of Yom To vthe second day of [[Yom Tov]], from the first day of [[Rosh Hashana]] to the second day of [[Rosh Hashana]], from one [[Shabbat]] to another [[Shabbat]]. <ref>Shemirat Shabbat KeHilchata 28:69 </ref>

# It’s forbidden to prepare on [[Shabbat]] even for a Mitzvah that is happening after [[Shabbat]]. <ref>Shemirat Shabbat KeHilchata 28:69 </ref>

# Preparation means any action even speech which isn’t needed for that day, however, if one action is done for both that day and also for after [[Shabbat]] it’s permissible. <Ref>Shemirat Shabbat KeHilchata 28:70 </ref>

# Therefore, it’s forbidden to washing vessels that won’t be needed, prepare food for after [[Shabbat]], fold clothing, rolling the Sefer HaTorah for the next Torah reading. <Ref>Shemirat Shabbat KeHilchata 28:71 </ref>

# When Erev Pesach falls out on [[Shabbat]] one shouldn’t clean the vessels used for Chametz rather one should just wipe them with one’s finger or have a non-Jew do it. <Ref>Shemirat Shabbat KeHilchata 28:71 </ref>

# When Purim falls out on Motzei [[Shabbat]], one may not bring the Megillah to shul on [[Shabbat]]. <Ref>Shemirat Shabbat KeHilchata 28:75 </ref>

# One may set one’s bed in order that the room look presentable, however, one shouldn’t make a bed (changing or putting down new sheets) in order to sleep on it after [[Shabbat]]. <Ref>Shemirat Shabbat KeHilchata 28:78 </ref>

# It’s permissible to go to sleep on [[Shabbat]] in order to be awake after [[Shabbat]], however, one shouldn’t say that one is doing so for that purpose. <Ref>Shemirat Shabbat KeHilchata 28:72 </ref>

# It’s permissible to clear the table even after [[Seudah Shelishit]] so that the room looks presentable unless one knows that will not use that room until the end of [[Shabbat]] (which is common if [[Seudah Shelishit]] finishes late). <Ref>Shemirat Shabbat KeHilchata 28:79 </ref>

# It’s permissible to do an action that isn’t any extra effort and it’s commonly done without thinking as long as long doesn’t say that one is doing so for after [[Shabbat]]. Therefore it’s permissible to take a Talit home from Shul, return a sefer to it’s shelf, return food to the refrigerator. <Ref>Shemirat Shabbat KeHilchata 28:81 </ref>

# It’s permissible an action that doesn’t require extra effort if not doing it will lead to a loss. Therefore if one left clothing outside one may take it inside to protect it from the rain if there’s a fear that it will rot. <Ref>Shemirat Shabbat KeHilchata 28:83 </ref>

# It’s permissible to learn Torah on [[Shabbat]] even if one is doing so for some need for after [[Shabbat]]. <Ref>Shemirat Shabbat KeHilchata 28:84 (in new editions 92), 39 Melachos (vol 4, pg 982), Yalkut Yosef ([[Shabbat]], vol 2, pg 216) </ref>

* Shemirat Shabbat KeHilchata (chap 28, note 206 and in new editions 220) quotes Rav Shlomo Zalman who was in doubt regarding whether it’s considered Hachana to study secular subjects not for the knowledge but only to do well on a test during the week. 39 Melachos (vol 4, pg 982) rules that it’s forbidden because of Hachana.

# One may not clean plates or utensils that were dirtied unless there’s a chance that they will be used later that day; nonetheless one doesn’t have to calculate how many of that utensil will be needed rather if one will need even one of a certain type of vessel one may clean many of that same type. One may clean cups because they are frequently used even not at the time of a meal unless one knows that one will not use it that day. <Ref>Shemirat Shabbat KeHilchata 12:1 </ref>

# After the Friday night meal one may clean the dishes in order to use them for [[Shabbat]] day meal. However, after [[Seudat Shelishit]] one may not clean the dishes even if one will be using them the next day. <Ref>Shemirat Shabbat KeHilchata 12:1 </ref>

# Vessels which if left dirty may become insect infested or if it’s silver it may become ruined one may let it soak in water even if one doesn’t plan on using it that day. <Ref>Shemirat Shabbat KeHilchata 12:2 </ref>

# If one removed food from a pot and there’s leftovers still on the sides one may soak the pot in water in order to prevent the leftovers from becoming stuck to the pot, however, if the leftovers already dried onto the pot then it’s forbidden to soak it because one is just doing so in order to make cleaning it after [[Shabbat]] easier. <Ref>Shemirat Shabbat KeHilchata 12:3 </ref>

# One may use hot water in order to clean dishes on [[Yom Tov]] (if those utensils will be used on that day), however, it’s preferable to heat up the water before [[Yom Tov]]. However, dishes that were dirtied before [[Yom Tov]] one shouldn’t heat up water in order to clean those dishes. <Ref>Shemirat Shabbat KeHilchata 12:4 </ref>

# One may use dishwasher soap in cold water, however, one shouldn’t put dishwasher soap into hot water (even a Kli Sheni). <Ref>Shemirat Shabbat KeHilchata 12:5 </ref>

# One may use soap in hot water which is in a Kli Sheni but one shouldn’t put soap into a Kli Rishon or have water from a Kli RIshon poured upon it. <Ref>Shemirat Shabbat KeHilchata 12:6 </ref>