Well, this was a stupid, stupid mistake ... I have a job interview with a scientific news publication tomorrow. They asked me to fill out an employment application to bring in with me, and as I was doing that today, I realized that on the resume I originally sent them, I put down the wrong start month and YEAR for one of my previous jobs (I wrote 6/2009 instead of 7/2010). This makes it look like I worked in this job for two years instead of only one.
This wasn't intentional AT ALL; it was pure thoughtlessness and sloppiness on my part (which I know is really idiotic and bad enough as it is, but not nearly as bad as lying). I'm not sure what to do about it, though. The publication I'm interviewing with is going to do a background check, so I'm sure the discrepancy between my actual start date at this job and what's on my resume will come up.
It seems like the best course of action would be to give them an updated resume at the interview and explain that I made an enormously careless mistake. I know that people intentionally lie about their start dates all the time, though, so I'm not sure they'd even believe me that it was unintentional (and even if they did, I'm sure they'd be like, "wtf is wrong with this girl that she got a start date wrong by a year and a month" ... I mean, *I* don't even know how I messed up that badly, except that I am renowned for doing ridiculously ditzy things like this all the time). On the other hand, keeping quiet and hoping they don't notice seems futile.
Any advice/thoughts/experience with similar situations?