500 In Greensboro, Which Day?

I received my Jan. issue of Swimmer today and as I glanced through the info on spring nationals I am now confused. On the entry form the mens 500 is on Sunday. In the "check in deadlines" info the mens 500 is on Sat. and the women swim it on Sun. I think the order has changed since I first printed it off months ago. Am I reading this wrong and simply confused?