You can go to www.infodog.com - click on "Show Information", then you can search by date - "Show Calendar" or even by state - "Search By State". I love Infodog as it has shows by all the supers on it.
Infodog has all the shows that are upcoming except some specialties, it only has the results for MB&F shows though. But if you know who put on the show, infodog has a link to that super so you can check on the correct site.