Contradictions/Rules and Islam

An interesting article over at the American Thinker talks about Hawaii voting to celebrate Islam day on Sept. 11 Julian calender Sept.24 Gregorian calender. Now we are using the Gregorian calender now so the date doesn't bother me as much as the fact that a state legislature would enact a day to celebrate any religion. I was under the impression that the government was to refrain fron endorsing any religion. Of course none of the rules seem to apply where Islam is concerned so I guess I shouldn't be suprised.