So there is no "rule" per se.

It's very annoying because there is no consistency.

No, there is no single fixed rule.

In the US, there are two main style guides that writers and publishers often adhere to: The Chicago Manual of Style and The Associated Press. But they have different recommendations too!


Whereabouts do you live?


PaulM

Central NY, but I grew up in Denver, CO. I am however, old.
I have a degree in Graphic Design, that's why it bugs me.