Close of Business
Cross-government
The end of the working day, commonly used to state a deadline in email or workplace instructions.
Example: Please send comments by COB Fri — and state the time if colleagues are in different time zones.
Also known as: Closing of Business, close of business, end of business
Context: Confirm the exact time and time zone when a deadline could be ambiguous.
Where you may encounter this
Evidence: Use may vary