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Flag Day
(redirected from June 14)

    Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.06 sec.
Flag Day, anniversary of the adoption of the American flag in 1777. It is celebrated on June 14 but is not a legal holiday.
(jargon)flag day - A software change that is neither forward- nor backward-compatible, and which is costly to make and costly to reverse. E.g. "Can we install that without causing a flag day for all users?"

This term has nothing to do with the use of the word flag to mean a variable that has two values. It came into use when a massive change was made to the Multics time-sharing system to convert from the old ASCII code to the new one; this was scheduled for Flag Day (a US holiday), June 14, 1966.

See also backward combatability, lock-in.


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In a thorough search with several telescopes, the groups failed to find a supernova associated with the June 14 event.
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Applications approved under Bank Holding Company Act. (Legal ... by Federal Reserve Bulletin
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