One thing that hasn't been mentioned yet is
the concept of "casual Friday." New Zealand
with its casual-through-the-week business
dress code probably does not have this
concept.

I have never worked at an office that observed
casual Fridays, and for all I know the trend
may be dying out. I have a friend who works for
a company that still has them, though. They
require business casual dress Monday
through Thursday, but on Fridays employees
are permitted to dress down. Dressing down
usually seems to mean that jeans can be
worn, and some companies also allow
T-shirts; others still require polo-style shirts.