English Dictionary

flag day

noun

(Britain, Ireland) A day on which a registered charity raises money, usually by selling small lapel flags. / (software) A day designated for changing to an incompatible system.

Flag Day is celebrated in Britain on June 14th.

意味（1）

(Britain, Ireland) A day on which a registered charity raises money, usually by selling small lapel flags.

意味（2）

(software) A day designated for changing to an incompatible system.

意味（3）

(software) A change which is neither forward nor backward compatible.