noun
Empire Day
Historical holiday celebrated in the British Empire, typically on May 24th (Queen Victoria's birthday). In Japanese contexts, it may appear in discussions of British colonial history or in translated works.
エンパイアデーは、かつて大英帝国で祝われていた祝日です。
Empire Day is a holiday that was once celebrated in the British Empire.
Variant with interpunct; less common in running text.
Borrowed from English 'Empire Day'.