Are any Jewish holidays off-limits to Noahides?

QUESTION: I was wondering if there are any Jewish holidays that are “off limits” to Noahides, or are we able to celebrate them all? I read on the Internet that Noahides can celebrate Passover, not in the Jewish way, but with some changes. Is this true? And if it is, how can I celebrate it?

ANSWER: The guidelines for Noahides regarding Torah or non-Torah holidays are explained in the chapter on the prohibition of making a new religion or adding a commandment, in “The Divine Code.” Please also see our Forum thread on “Optional Observances for Noahides” and our web page https//asknoah.org/essay/noahide-holidays