Have a phone interview with my dream employer this week and just realized the resume I gave them has incorrect dates for some of my recent employment history

Last week, I happened connect with someone in a management role at my dream company who ended up telling me about this particular job opportunity and asked for me to send him my resume ASAP. Since I haven't been looking for new work recently, my resume was a little dusty and I very quickly updated it and sent it off that night, as I wanted to make sure he knew I was serious and interested. Fast forward to this week, and a recruiter has reached out to set up a phone interview with me. Should be a slam dunk interview, except...

I pulled up my resume today while doing some practice/prep for the interview, and my heart dropped into my stomach.

In my haste to get him my resume ASAP, I clearly didn't proofread well enough, because today I realized that I have the dates completely wrong for probably the main selling point of my employment history. In reality, I was at this company from 2016 to 2019, yet on my resume, I put 2017 to 2020. So the length of time is correct, but the actual start and end dates are 1 year later than they actually were. I've been doing gig work for the entire period since 2019, so either way I don't have a gap on my resume afterward, although it's not particularly high quality or relevant experience for the last couple years either.

Either A) I was sloppy and careless on an extremely important document, which would be very bad because this job I am interviewing for involves handling important contracts and legal documents where getting a date wrong can be a pretty huge deal, or B) I'm a big fat lying liar who lied on his resume, which is even worse.

What should I do? Just proceed with the phone interview, say nothing, and pray that the exact date mismatch never becomes an issue? Fess up immediately at the start of the phone interview and explain what happened? Or, proceed with the interview without directly fessing up, but then when speaking about my experience, use the correct dates as if I never even realized that the resume was wrong?

I don't want to be dishonest, but I also don't want to unnecessarily call attention to ultimately what could be a very minor detail that doesn't actually change a whole lot about my experience. Is this the kind of thing that would get noticed in a background check if I were to get hired?

tl;dr The pandemic has completely warped my sense of time, and I accidentally put 2017-2020 for the main experience on my resume, but it was really from 2016-2019. Now I have an interview based off the incorrect resume. What do?

usa jobs
usa jobs resume
usa hotel jobs
usajobs
usa jobs federal government
usa job in ksa
usa jobs
usa jobs login
usa jobs gov
usajobs.gov
www.usajobs.gov
usajobs.com
usajobs
usajobs.gov official