Regular business attire around here in the summertime? Dockers, white cross-trainer shoes and a polo shirt. Come to think of it, they dress that way all year round...

Obviously, neither I nor anyone else on this forum is going to think that a kilt wouldn't fit in with appropriate business attire. I think that one of the reasons that these office managers deny permission is that they think that it would be the first slip on the slippery slope. The next day, somebody else shows up in shorts and claims that it must be okay because you wore the kilt the day before.

Best

AA