The US does not, officially, recognize Valentines, Halloween, Earth Day, or anlpad of others. New Year’s is purely secular. The rest on your list did not originate as secular holiday. They were solemn memorial days set aside with reference directly to the JudeoChristian God when debated, voted, and signed into law.
“The US does not, officially, recognize...”
Never said they did. I said that holidays can be created at state level and are accepted at that location only, or other states as wished, then it is an official state holiday. So if a state wishes to create a law that follows sharia methodology, then it can be accomplished. And if someone complains about a holiday appearing to resemble, or even copy sharia law, then if the people or in some cases the legislature of the state vote it in, and the governor signs it, you have a holiday for that state.
wy69