8. Mincha of Shabbos:

When?[1] One is to Daven Mincha earlier than usual in order to have time to eat the third Shabbos meal.

Tzidkascha:[2] If Tisha B’av falls on Motzei Shabbos, the paragraph of Tzidkascha is omitted in Mincha.[3]

Pirkeiy Avos on Shabbos that falls on Erev Tisha B’av: When Tisha B’av falls on Sunday, some Poskim[4] rule Pirkeiy Avos is not recited on Shabbos after Mincha. Other Poskim[5], however, rule it is to be recited. [Regarding the Chabad custom in this matter, the Rebbe spoke about this issue on numerous occasions, at times saying it is to be said[6] and at others leaving it to the person to decide.[7] Practically, when Shabbos falls on Tisha B’av and is Nidche, the widespread custom has become to not say Pirkeiy Avos.[8] Some[9] conclude Pirkeiy Avos is not to be said even when Tisha B’av falls on Sunday and is not Nidche. In any event, one is to repeat that same chapter the next week, even if he decided to recite it.[10]]

 

May an Avel recite Mishanyos after Mincha Erev Tisha B’av as he does throughout the regular year? When Erev Tisha B’av falls on Shabbos, seemingly he is to recite the regular Mishnayos after Mincha.[11] However, some Rabbanim[12] hold that even in such a case he is to recite the Mishnayos of Moed Katan. May one who is not fasting receive an Aliyah? No. See Chapter 1 Halacha 4!

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[1] See Rama 552:9

[2] Michaber 559:1

[3] The reason: As Tisha B’av is considered a Moed. [Beis Yosef; Kaf Hachaim 559:1]

[4] Rama 553:2; Maharil; M”A 553:7 in name of Kneses Hagedola

[5] Taz 553:2; Rashal; Gra; M”B 553:8; Aruch Hashulchan 553:2

[6] Likkutei Sichos 19:43 footnote 53

[7] Hisvadyus Shabbos Chazon Erev Tisha B’av 1981

[8] Toras Menachem 1985 5:2695

[9] Hiskashrus 950

[10] Hisvadyus Shabbos Nachamu 1981

[11] Likkutei Sichos 14:185

The reason: As otherwise it is Aveilus Bifarhesya, and so exclaimed the Rebbe to Rav Groner that he is surprised at the ruling of the Rabbanim who ruled to him to say the Mishnayos of Moed Katan. [See Yoman of Rav Groner 1988]

[12] Answer of Beis Din to the Rebbe upon him asking which Mishnayos he is to recite, and so did the Rebbe that year, he recited from Moed Katan