R help - Mar 2014 - "2013-06-28" coverts to 15884?

MaxUpdated_row<-NULL
MaxUpdated_val<- "2013-06-28"


rbind(MaxUpdated_row, as.Date(MaxUpdated_val, "%Y-%m-%d"))
      [,1]
[1,] 15884

c(MaxUpdated_row, as.Date(MaxUpdated_val,
"%Y-%m-%d""))
>[1] 15884
c(MaxUpdated_row, MaxUpdated_val)
>[1] 15884
Evidently, I'm again missing something simple, as I would prefer to be able
to see the actual date to be shown.  

I found a work around, but I don't like it, as I have to convert back to
date later:
c(MaxUpdated_row, as.character(MaxUpdated_val))

Any alternatives suggestions are much appreciated. 
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