Maybe s/o could help me:
I looked around and could not find exactly when one is allowed to shave tomorrow (before or after chatzos). All i found is that if Lag B'omer falls out on Sunday, then one could shave on Friday.
Anyone?
Chok Yaakov 7, Shulchan Aruch Harav 5, Chayei Adom 131:11, Mishnah Berurah 5, Aruch Hashulchan 6, L’Torah V’horah 2: page 19:2 quoting the opinion of Harav Moshe Feinstein, zt’l, Rivevos Ephraim 6: page 294:2, Orchos Rabbeinu 2: page 95:11, see Chok Yaakov 7. This is even according to the Sefardim (Bais Dovid 208). Lag B’omer falls out on Sunday in the following years (5771, 73, 74, 77, 84, 88, 91, 94, 95, 97, 98). Some say to take the haircut on Friday after chatzos if possible, although taking it before chatzos is also permitted (Halichos Shlomo Moadim 2: page 364: footnote 79).
Did some cut n paste.
.. Basically your allowed b4 chatzos...