It's past the date on my bottle. Is my beer still good?

I have a case of coors light in bottles that I forgot I had sitting in my pantry. They're the cold activated bottles and the date on them is Mar2111. Is it still alright to drink them since it's june 10th. They've been sitting in their box in the pantry so they haven't been refrigerated. I don't know if that matters any. Normally I wouldn't forget about beer cause it's beer and it's awesome but it was hidden behind our giant supply of bulk food that takes forever to get through. Poor poor beer. :(