Hawaii Legislature Proclaims Sept. 24, 2009 as Islam Day.

For the resolution, see here; for a brief story about the vote, see here. By way of comparison, here's Pres. Reagan's 1983 Year of the Bible proclamation, then-Gov. George W. Bush's 2000 Jesus Day proclamation, and excerpts of Nebraska Gov. Michael Johanns's 1999 March for Jesus Day proclamation.

Thanks to Religion Clause for the pointer.

UPDATE: Thanks to Margaret Schoen for letting me know about the Jesus Day proclamation; I added it to the last sentence in the first paragraph, as well as the Nebraska March for Jesus proclamation that I also found.