follow Dictionary.com

Get the details behind our redesign

flag day

noun, (sometimes initial capital letters) British
1.
Origin
1910-1915
1910-15

Flag Day

noun
1.
June 14, the anniversary of the day (June 14, 1777) when Congress adopted the Stars and Stripes as the national flag of the United States.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for flag day

flag day

noun
1.
(Brit) a day on which money is collected by a charity and small flags, emblems, or stickers are given to contributors

Flag Day

noun
1.
June 14, the annual holiday in the US to celebrate the adoption in 1777 of the Stars and Stripes
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
flag day in Technology

jargon
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.
[Jargon File]
(1998-01-15)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
Cite This Source
Encyclopedia Article for flag day

Flag Day

in the United States, a day honouring the national flag, observed on June 14. The holiday commemorates the date in 1777 when the United States approved the design for its first national flag

Learn more about Flag Day with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of The Day

Difficulty index for flag day

Few English speakers likely know this word

Word Value for flag

8
10
Scrabble Words With Friends