Martin Luther King Day Does it receive Financial Respect?

Does the US Market consider Martin Luther king Day a true holiday. I monitored press releases issued on Jan 16, 2006. While the volume was clearly off the pace was very brisk. Lots of product and marketing communication messages went out. The markets were closed but I spotted 14 releases that I would normally include in my weekend follies. The most significant was Nasdaq Stock Market making a release about changes with the SEC. I am just not sure what to think about that. Comments from NASDAQ (NASDAQ:NDAQ) would be appreciated. The remaining culprits are
Bakbone Software (TSX:DKP), Allos Therapeutics (Nasdaq:ALTH), First Defiance (Nasdaq:FBEF), CE Franklin (Amex:CFK), Renaissance Learning (NASDAQ:RLRN), Kenneth Cole Productions (NYSE:KCP), Compass Bancshares (NASDAQ:CBSS), Amcon Distribution Company (Amex:DIT), Macataua Bank Corporation (NASDAQ:MCBC), Duke Realty (NYSE:DRE), Innovex (NASDAQ:INVX), Cinenergy Corp (NYSE:CIN), Equity Office Properties Trust (NYSE:EOP)