WOW...so confused today...

So, I headed on over to Walgreens with my deal that was only good today 2/12/2010 except for today is 2/11!!!!! Blah...I feel like such a loser! I was at the cash register & the girl was like, "ummmmmm...that is tomorrow." All I could think was "What day is it?????" Wow...well, I'm am very sorry if I made anybody else waste a trip! :( Or did you all catch that mistake? If you did shame on you for not telling me! :)