Is permitted for one to get a haircut on Erev Pesach after midday?
It is forbidden for a Jew to give one a haircut after midday, however it is permitted for a gentile to give one a haircut. Accordingly, if it is already after midday on Erev Pesach, he can go to a gentile barbershop and get a haircut.
Sources: Admur 468:4-5; 340:2; Michaber 468:1 in name of Yeish Mi Shematir; Rama 468:1; Rokeiach 310; Taz 468:2; Rashal on Semag L.S. 75; Bach 468; Chok Yaakov 468:4; Elya Zraba 468:1; Ishkavta Derebbe p. 37