Fashion question - interview suit

[Major Nikon]

41. A button down collar is considered less formal

A more traditional option would be to go with a spread or point collar. Most better quality dress shirts will include collar stays which go behind the points and are hidden. Other options are a hidden button down or use a collar bar with the latter option being a bit old fashion and somewhat fallen out of favor, although still considered acceptable for business formal.

That being said the unwritten rule about button down isn't that solid these days. You'll see many high level professionals using button down and I doubt many would even be aware of the faux pas and those who are wouldn't give it a second thought.

Personally if I had no other option besides a button down, I would wear a button down to an interview. It's not worth going out and buying a shirt just for the occasion. So I agree with your wife.

Don't forget to match your shoes to your belt (black only in this case). Your shoes should be a low quarter oxford or a derby in that order. There's other shoe options, but none that are as good. Naturally they should be polished. Do NOT wear patent leather. It's a good idea to match the tone of all your metal pieces. In other words if your belt buckle is silver, wear a silver watch and/or silver cuff links, etc. Black socks naturally. A pocket square is a nice touch, but not required. If you do wear one, make sure it's white and folded conservatively. Presidential is best or a one or two point if you must. Do NOT match the pocket square to your tie.