Definitions from Wiktionary (Flag Day)

▸ noun:  (British, Ireland) A day on which a registered charity raises money, usually by selling small lapel flags.
▸ noun:  (Hong Kong) A day on which a registered charity raises money, usually by selling small stickers.
▸ noun:  (software) A day designated for changing to an incompatible system.
▸ noun:  (software) A change which is neither forward nor backward compatible.
▸ noun:  A day commemorating the adoption of a national flag.
▸ noun:  (Australia) September 3, for the first flying of the Australian flag in 1901, Australian National Flag Day.
▸ noun:  (Canada) February 15, for the inauguration of the Canadian flag in 1965, National Flag of Canada Day.
▸ noun:  (US) June 14, for the adoption of the US flag in 1777.





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