Trending Semi Formal Mens Outfits Winter : Whether if it's a wedding, business or conference meeting, restaurant, dance, or party, semi formal events require the suitable outfits for both women and men. At its absolute core, men's winter fashion is totally simple: Semi Formal Mens Outfits Winter - = day (before 6 p.m.) = evening (after 6 p.m.) = bow tie colour = ladies.