How old is this White Labs yeast?

This vial of Czech pils yeast says to use on or before Nov. 11, 2012.  So, how old is it?

The White Labs says their yeast has a 4 month shelf life.  Does this indicate that my vial is ~2 months old?

Count bact 4 months from nov 11 to get a “birth” date of July 11th

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