Q. This year that Lag Baomer is Thursday, if one finishes the sefira restrictions on that day, should he better wait until Erev Shabbos to cut his hair likvod Shabbos?
A. Horav Shlomo Miller’s Shlit’a opinion is that it is unnecessary to wait until Friday and if he wishes he can cut his hair on Thursday and it would be considered Likvod Shabbos

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a