Q. Do chassan/kallah fast on T’u Bishvat? (the wedding is the night after).

A. Horav Shlomo Miller Shlit’a pointed out to Mishna Berura (573: 7) quoting Magen Avrohom , that they should not fast on Tu Bishvat. However they should avoid drinking any liquor during the seudos of Tu Bishvat.

Rabbi Abraham Bartfeld as revised by Horav Shlomo Miller Shlit’a