Any celebration in support of the Rebellion, Jedi, or any similar traitors is punishable by death. Most people starve to death long before they’re ever shot by Stormtrooper firefights. Celebrations are illegal in the Star Wars universe, but it’s not illegal to celebrate in the U.S. It’s illegal in any way to celebrate “May the Fourth” with a Star Wars fan base, the Empire Empire says, and it’s illegal to kill anyone who supports the Rebellion.”]
Source: https://gizmodo.com/the-empires-may-the-fourth-be-with-you-attack-ad-487395167