Would it also be good if a Hindu society had a "Bring your Bhagavad Gita to School Day"? Or an Islamic center had a "Bring your Q'uran to School Day"?
Any student can bring any book to school, provided it does not interfere in their school work, and they do not use it to beat or bully someone else with.
That's been true since 1963.
The Supreme Court has never held otherwise.