very weird comapp mistake...please give advice!

<p>I was looking through my harvard application today, and I saw that for graduation date, I put 2009 instead of 2010 (very accidental, as I am still in high school, lol!). I think they should easily understand it was a mistake, as my counselor had to write graduation date on secondary school form and also transcript from my school and stuff, but will this hurt me very much as long as I let them know ASAP? I submitted my app on 12/2...i know it's been a while...gah...very worried. :< .....</p>

<p>Just call them and let them know.</p>