Empire Day

Empire Day was a holiday marking the anniversary of the rise of the Galactic Empire at the end of the Clone Wars. The holiday was established by the Imperial government. It was also the day Ezra Bridger was born.

Festivities of the holiday included a parade on various Imperial-controlled planets, the playing of the Imperial anthem, as well as airing a clip of the speech made by Emperor Palpatine that formed the Galactic Empire. The clip was doctored to make the Emperor seem younger and more physically appealing than he actually was at the time of the speech.

Behind the scenes
The term Empire Day was derived from a holiday within the United Kingdom, celebrating the anniversary of the British Empire's formation between 1902 and 1958. Coincidentally, the holiday fell on May 20, which was also the day of the UK's premiere of Star Wars: Episode V The Empire Strikes Back, which resulted in a "revival" of the holiday of sorts.