Comment by skinkestek

> Just set your preferred UI language to English in System Settings – Language and Region and Excel will honor that

That might work - assuming IT policies don’t block it - but it could easily break a bunch of other things on my machine.

> There's probably a similar system setting for the date format

Maybe. But I’ve been a power user for 30 years (counting from my first full Windows restore), and I taught my first IT course in the late ’90s - so if there is an easy fix, I’m honestly kind of impressed with my own ability to miss it.