[R] Compiling date

[Megh Dal]

Hi,

I have following kind of dataset (all are dates) in my Excel sheet.

09/08/08
09/05/08
09/04/08
09/02/08
09/01/08
29/08/2008
28/08/2008
27/08/2008
26/08/2008
25/08/2008
22/08/2008
21/08/2008
20/08/2008
18/08/2008
14/08/2008
13/08/2008
08/12/08
08/11/08
08/08/08
08/07/08

However I want to use R to compile those data to make all dates in same format. Can anyone please tell me any automated way for doing that?