Accepted by whom?

I hate it when marketers get to make up their own meaning of commonly used words, usually making them mean less than they ordinarily do. With "all-day" meaning anything between 6.5 (see parallel comment) and 20 hours, it's becoming a worthless and purposefully confusing term.

(Note if that a physical store advertises it's open "all day", you expect it to be open from 00:00 to 23:59.)