This Halacha is an excerpt from our Sefer
Delaying a court case with a gentile:
One who has a court case against a gentile during this time is to find ways to delay it, as during this time a Jews Mazal is weak.
Until when is one to avoid a court case with a gentile?
 Michaber 551:1; Rav Papa Taanis 29
 M”A 551:2 in name of Rabbeinu Yerucham regarding avoiding a court case with a gentile; M”B 552:2
 Kaf Hachaim 551:1 and 3; Ben Ish Chaiy Devarim 1; Aruch Hashulchan 551:11; M”B ibid “At the very least until after Tisha B’av”
 Glosses of Chasam Sofer 551; Yifei Laleiv brought in Kaf Hachaim 551:3; Rebbe in Shaareiy Halacha Uminhag 2:225 regarding moving
The reason: As good events occurred on the 15th of Av hence changing the tone of the month.