Q. As Lag baomer is Sunday you can shave on Friday likvod Shabbat, can this be done in the morning?

A. When Lag Baomer occurs on Sunday you are allowed to shave and take a haircut already in the morning of Friday.

Horav M. Feinstein Zt”l (M’asef Letorah Vehoraa 2, p. 19) explains that the reason for the permit is that if you would wait until Sunday, it would appear that the honor given to Lag Baomer supersedes kvod Shabbos.

Although some Poiskim permit a haircut already on Thursday night (Rivevos Ephraim O.H. 1, 338 quoting Rav Binyomin Silver), Horav Shlomo miller’s Shlit”a opinion is that it is only permitted in cases of great need.

Rabbi A. Bartfeld as advised by Horav Shlomo Miller Shlit”a