Haircut on Friday when the thirtieth day falls on Shabbat

Mourning for a brother who passed away, and the thirtieth day falls on Shabbat. Is it permissible to have a haircut on Friday, the twenty-ninth day, in honor of Shabbat?

One should not have a haircut before part of the thirtieth day has passed. However, one who is lenient and has a haircut on Friday when the thirtieth day falls on Shabbat has what to rely on.

The Rema writes in Siman T, סעיף ב: "If the thirtieth day of mourning falls on Shabbat and the twenty-ninth day on Friday, it is permitted to wash on Friday, even in places where it is customary not to wash for all thirty days, since by law it is permitted after seven days, but it is customary to be stringent for all thirty days, in such a case it is permitted due to the honor of Shabbat." From his words, it is implied that only washing is permitted, not a haircut. The Dagul Mervavah also writes that a haircut, which is prohibited by law for thirty days, is prohibited on Friday. The Pitchei Teshuva, סעיף קטן ו, writes: "In the book of Rabbi Maharitz, z"l, regarding shaving, and see in the responses of my great-grandfather (PMA, part 2, סימן קמח/קמט), where he writes that for those who prohibit shaving, it is also prohibited to cut nails with a knife, and he ruled so. See in the responses of Teshuvat Chen, סימן לג, where he elaborates on this and concludes that one who is not troubled by it can rely and be lenient in honor of Shabbat, even regarding shaving, see there." In the commentary of the Gra on סעיף "אם", it is implied that his opinion is that even a haircut is permitted, and all mourning laws are permitted. The Maharil also writes so. Therefore, although the ruling is to prohibit, nevertheless, one who is lenient should not be stopped.