Answer:
Wednesday, September 18, 2011 is identical to Wednesday, September 18, 2001.
Explanation:
The identical pair of dates are those which indicates the same data. We need to look for specific characteristics like commas and cardinal numbers.
So, January 21st, 2011 is not identical to January 21, 2011.
Wednesday, September 18, 2011 is identical to Wednesday, September 18, 2001.
Tuesday, October 2nd isn't identical to Tuesday. October 2nd, because the second one has a point instead of a comma, the proper format requires comma.
Lastly, 12-01-2011 is not identical to 12-1-2011, because, the format requires a zero before the number when the month is less than 10