Band shirt, ties are pretty obnoxious unless they're required although I'm a fan of blazers, dressy shirts/pants.
Here in the tropics we normally just wear slacks and nice button down shirts - about half the year long sleeve shirts are ok, but during the 'summer' (now) you really have to go for the short sleeves. I only wear a blazer or tie if there is a special event, and mainly because the college insignia is on the blazer.
I suppose this slacks-and-button-down is normal enough for profs anywhere in the world.
That's the uniform of professors here, for the most part.
Ties are just too constricting and a hassle. Why anyone considers them necessary at this point, beyond ceremonial events, is beyond me.
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