5. Bris Mila during the Three weeks:

May one dance during the Seudas Mitzvah? Many Poskim[1] rule that [up until the nine days[2]] it is permitted to dance during a Seudas Mitzvah, such as by a Bris, Pidyon Haben, Sheva Brachos, Bar Mitzvah, Siyum Misechta.[3] However, other Poskim[4]rule it is forbidden to dance even on these occasions. Some[5] rule one may dance, although may not listen to music.

Shehechiyanu:[6] One may say Shehechiyanu during a Pidyon Haben [or Bris Mila[7], for those accustomed,] that takes place during the three weeks, as he should not lose out from the Mitzvah. [This applies even on Tisha B’av.[8]]

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[1] Kneses Hagedola 551:33; Chaim Sheol 1:21; Oas Chaim Veshalom 265:29 regarding Bris; Mishneh Halachos 6:109 in name of Rav Moshe Feinstein regarding Sheva Brachos; Kaf Hachaim 551:40 [regarding music by Mila] depends this matter on the dispute regarding whether one may build for the need of a Mitzvah [see Rama 551:2 “For the need of a Mitzvah it [building] is all permitted”; The Kaf Hachaim 551:33 brings Poskim who argue on Rama.] The Kaf Hachaim ibid concludes that those which are lenient have upon whom to rely.

Ruling by Sefira: Implication of Admur 493:1; M”A 493:1; M”B 493:3 that the prohibition only applies by “Seudas Reshus” and so rule: Keren Ledavid 119; Igros Moshe 2:95 and in Even Haezer 1:97; Mishneh Halachos 6:109; Yechaveh Daas 6:34

[2] Piskeiy Teshuvos 551:13

[3] See Rashal Baba Kama 7:37 that a Bar Mitzvah is considered a Seudas Mitzvah even if it is not taking place on time, so long as Drasha is recited.

[4] Elya Raba 551:26; Siddur Yaavetz; Initial ruling of Kaf Hachaim ibid; Shraga Hameir 2:13; Orchos Rabbeinu 2:128; Shraga Hameir

Regarding Sefira: So rule regarding Sefira: Maharsham in name of Daas Kedoshim; Minchas Yitzchak 1:111; Shraga Hameir 2:13

[5] Mishneh Halachos ibid; See Piskeiy Teshuvos 551:13

[6] Michaber 551:17; Beis Yosef 551

[7] Mamar Mordechai 551:16; Kaf Hachaim 551:216

[8] Daas Torah 551; Piskeiy Teshuvos 551:54

Other opinions: Some Poskim rule Shehechiyanu is not to be recited on Tisha B’av. [Gur Aryeh Yehuda Y.D. 116]