1. Empire Day - Noun
2. Empire Day - Proper noun
British, anniversary of Queen Victoria's birth
Source: WordNetOn Empire Day, May 24, Queen Victoria's birthday, it was not unusual to herd school children together and march them down to the cinema where we sang patriotic songs such as Born In The Land Of The Mighty Roraima. Source: Internet
Schools across the Island celebrated Empire Day. Source: Internet
… that Ezra had his 17th birthday – Empire Day – before Season 3 Premiere. Source: Internet