I have updated my original script to include the +num and -num functionality to show dates in the past and future given an option argument.
So for example, given that today is Sunday April 28, 2013:
date +3 would print: Wednesday May 1st, 2013
date -7 would print: Sunday April 21st, 2013
Here ya go: http://cl.ly/3w0O0p3Q3j0X