T o d a y
"Today" (of course the answer only works when today is 15th March 2011).
If it was on the same day when the question was asked then the answer is: today
If that was the date were currently, the answer would be "today".
The day after yesterday but the day before tomorrow which is today.
To write 24 January 2014 in 5 letters without using numbers kindly write 24.1.14.