Erev Pesach falls on Shabbos-Guideline and Summary-Part 3-Shabbos day and Motzei Shabbos-Seder night

Shabbos Day:

• Early Shacharis: Shacharis on Shabbos must be Davened early, with enough time for people to come home and eat their Shabbos day meal before the 5th hour of the day, before Sof Zman Achilas Chametz. The chazan must be warned not to lengthen the davening.
• The time of the Shabbos day meal: All eating of Chametz must be completed by the start of the 5th hour of the day [Sof Zman Tefila]. Due to this, one who is using Chametz for Lechem Mishneh is to complete the entire meal before the 5th hour of the day.
  • Alternatively, when the 5th hour of the day arrives, one is to stop his meal and recite Birchas Hamazon, and then eat the remainder of his food later on. [Thus, one can simply eat a Kibeitza of bread before the start of the 5th hour of the day, recite Birchas Hamazon, and then have a complete Kosher for Pesach meal later on.]
  • One is not to continue the meal after the 5th hour even if he does not plan on eating anymore Chametz, as the foods eaten are no longer included in the blessing of Hamotzi once it is forbidden to eat Chametz, as explained above in D.
• The meal – Lechem Mishneh: One recites Lechem Mishneh over two whole loaves of bread for the Shabbos day meal, unless one of the valid non-Chametz alternatives are used. See Halacha D for full details of this matter!
• One who overslept: One who oversleeps on Shabbos morning and is unable to finish Shacharis with enough time to eat Chametz before the 5th hour of the day, cannot use Matzah for his Shabbos meal and thus forfeits his ability of Lechem Mishneh. Rather, he is to fulfill his meal with other available foods.
• How much bread to eat: See Halacha D!
• Being careful to guard the crumbs and may one eat the bread with other foods during the meal? See Halacha D!
• Those who plan to eat bread only at the beginning of the meal: See Halacha D!
• Brushing one’s teeth: Prior to the start of the 5th hour of the day, one is to clean his mouth and teeth in a way permitted on Shabbos. One may use a toothbrush without water, or a toothbrush that does not have a problem of squeezing.
  • One must be careful not to make himself bleed.
  • One may use precut dental floss.
  • One who has fillings is to swish hot water in his mouth. Dentures are to be removed and Koshered before Shabbos.
• Cleaning the leftover Chametz: All Chametz must be destroyed or removed from one’s home prior to the start of the 6th hour on Shabbos. The following are the details of this obligation:
  • All leftover Chametz crumbs which are less than a Kezayis and have fallen onto the floor prior to the 6th hour of the day, onto areas that people walk, are considered destroyed and don’t have to be removed. 
  • If one’s area contains an Eiruv, one can throw the crumbs outside into a public for all area.
  • One can flush the Chametz crumbs down the toilet.
  • If one verified with the Rav who performed the sale that the sale includes all the Chametz one owns until the 6th hour on Shabbos then one can place the Chametz in the area sold to the gentile, if one performed Mechiras Chametz.
  • Leftover large pieces of Chametz: If one’s area contains an Eiruv, one can throw the Chametz outside into a public for all area. Alternatively, one can break the Chametz to small pieces and flush it down the toilet.  Alternatively, one can place the Chametz in the area sold to the gentile, if one performed Mechiras Chametz, and the sale includes all the Chametz one owns until the 6th hour on Shabbos. This matter should be verified through the Rav who performed the sale.
  • Tablecloth and plates:  The tablecloth needs to be shaken from any Chametz crumbs and discarded, as explained above. Likewise, the plates and all other eating utensils are to be cleaned from any visible Chametz using one’s fingers or napkin.
    • The napkin used to clean the utensils is to be flushed down the toilet or thrown into a public area if there is an Eiruv.
    • Disposable plates and utensils may be simply thrown into the garbage and discarded outside to a public for all area, in areas with an Eiruv. If, however, one does not have an Eiruv in his area, then one needs to clean even the disposable plates from any visible Chametz.
    • To avoid the need to clean the utensils, it is advised to eat all the Chametz foods over napkins and then flush the napkin down the toilet.
• Bittul-Kol Chamira: When Erev Pesach falls on Shabbos, the second Bittul which is normally said after Biur Chametz, is delayed until Shabbos morning.
  • It is said after completing the eating of Chametz on Shabbos morning, prior to the end of the 5th hour of the day.
  • The Bittul is to be recited even if one has no more Chametz in his possession after the 5th hour.
• Chametz leftovers past the 6th hour of the day: If one finds Chametz in one’s home after the start of the 6th hour, or for whatever reason did not have time to finish cleaning the Chametz from the meal until the 6^th hour, then he is to have a vessel placed over it until Motzei Yom Tov and it is then to be burnt [or placed in the area sold to the gentile if one performed Mechiras Chametz, and the sale includes even the leftover Chametz of Shabbos.]
• Preparations for the Seder: One may not do any preparations for the Seder on Shabbos, and therefore the preparation must be performed on Erev Shabbos. These include the following: 1) Roasting the Zeroa; 2) Cooking the egg; 3) Washing and checking the lettuce; 4) Dicing the Maror [horseradish]; 5) Making the Charoses; 6) Initially making salt water.
• Setting the table: The table may not be setup for the Seder until after Shabbos and the saying of Baruch Hamavdil Bein Kodesh Likodesh.
• Sleeping:  It is permitted to go to sleep on Shabbos for the sake of being awake on the night of Seder. One may even say that he is going to sleep for the sake of having strength to be awake by the Seder.  One however may not say “I am going to sleep today on Shabbos so I have strength to do Melacha, such as cooking, after Shabbos.” 
• The Shalosh Seudos menu? For the third Shabbos meal, one is to eat meat and fish. If this is unavailable, one is to eat fruits and vegetable. Although one can technically fry/cook Matzah before Shabbos, and eat it for the third meal, practically, it is not customary to do so. 
  • In all cases, those who are accustomed to eat Matzah Ashira [i.e. Sephardim] or fried Matzah for the third meal, must be careful to complete their meal prior to the 10th hour of the day. However, meat, fish, and fruits and vegetables may be eaten even past the 10th hour of the day, in limited quantities.

1. Motzei Shabbos-The Seder:

• Baruch Hamvdil Bein Kodesh Lekodesh: After the leave of Shabbos one is to say Baruch Hamvdil Bein Kodesh Lekodesh and only then begin the preparations for the Seder, such as set up the food and the table and the like.
• Candle lighting: The candles are only to be lit after nightfall, and only after reciting “Baruch Hamavdil Bein Kodesh Lekodesh.
• Yaknahaz: When Yom Tov falls on Motzei Shabbos one says Yaknaha”z in the order of Kiddush.  The order of the blessings is: 1) Hagafen 2) Kiddush Hayom 3) Ner 4) Havdalah 5) Shehechiyanu. This is called Yaknahaz.
  • The blessing of Besamim is omitted from the order of Havdalah “Yaknahaz”.
  • Haeish: The custom is to say the blessing of Meoreiy Haeish over the Yom Tov candles that were lit. We do not place the candles together, and nor do we place our nails towards them. Rather, we simply look at the candles after the blessing and then continue with Yaknahaz.]
  • Are women to say their own Kiddush with Havdalah when the Seder falls on Motzei Shabbos? Those women who are accustomed to say their own Kiddush for Kadesh by the night of the Seder may do so even when the Seder falls on Motzei Shabbos, and they thus must recite Havdalah over the wine. This is despite the fact that in general women do not drink from the leftover Havdalah wine, and that according to some Poskim they are not even obligated in Havdalah.  They may even say the blessing of Meoreiy Haeis.  Some Poskim, however, rule that women are not to say the blessing of Haeish. Furthermore, in some communities, when the night of the Seder falls on Motzei Shabbos the custom is for the women to say their own Kiddush until the blessings of Havdalah, and then hear the blessings of Havdalah from the leader of the Seder.
• Min Hazevachim and Min Hapesachim: In the blessing of Asher Gealanu one is required to first say Min Hazevachim and only afterwards Min Hapesachim. However, when Pesach falls on Motzei Shabbos some are particular to first recite Min Hapesachim and only afterwards Min Hazevachim.  Others however are not particular in this matter [to say it in this order when Pesach falls on Motzei Shabbos], and rather they always say Min Hazevachim and only afterwards Min Hapesachim].  [Practically, the Chabad custom is like the former opinion.]