They are closed most holidays. I think last year I went on Memorial day or maybe it was Labor day only to find it closed. And since Costco is an hour away, I avoid all holidays.
That is too bad because I absolutely HAD to shop yesterday, so I ended up going to Sam's Club and stocking up instead. I prefer Costco, but we were out of several things and having DH home and allowing me to shop sans children was wonderfuL!