The trap is time zone ambiguity. COB Sydney, COB London and COB New York are not the same moment, so global teams should add the time zone when it matters.
Common questions
What does COB (Close of Business) mean in simple terms?+
COB means close of business: the end of the working day. It is often used in emails and project updates as a deadline.
What is the difference between COB (Close of Business) and similar terms?+
The trap is time zone ambiguity. COB Sydney, COB London and COB New York are not the same moment, so global teams should add the time zone when it matters.