Still didn't work
I went to the results page and clicked edit the validations that were already there. I added the "date/time" validation type, used the "showbegin" dynamic variable and then entered the code you gave me in the "minimum" date area. I clicked OK and then saved the form and uploaded everything to the server.
Unfortunately it still allows me to enter a date prior to 5/15/2013 which is what I wanted to prevent. When the results are displayed they include events prior to 5/13/2013. Actually I don't care what date the person searching wants to enter... I just don't want anything before two years ago displayed.
I'm all ears for suggestions!!!!