The company that I work for is literally global hence it could truly be said is never closed for business, (some sections even function on Christmas Day, either because of regional observances or because the work cannot be interrupted). Likewise operations such as the health services and other emergency services have no true Close of Business.
But you still hear, or see in e-mails, things like "I need this report by COB today".
I am wondering if anybody knows of a clear unambiguous word, phrase or abbreviation for what such writers really mean, i.e. before the end of normal office hours at this location, who knows maybe if I can find something I can, by example, get everybody to use it.