bank holiday

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A day on which banks are legally closed.
• noun Chiefly British A legal holiday when banks are ordered to remain closed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chiefly UK In Great Britain and some other countries, a weekday, often a Monday, on which most businesses are closed and granted to workers as a national holiday.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any of several weekdays when banks are closed; a legal holiday in Britain