My best friend has been lying to me for years?

So, I was bored last night, and I decided to google my best friend. We’ve been best friends for seven years, and her birthday is August 3rd. But when I looked at her voter registration and a ticket from traffic court, it says her birthday is October 10th. And I’m pretty sure you can’t lie on your driver’s license since you have to show a birth certificate in order to get it here. I can also remember around when we met me asking her when her birthday was and her saying October, then giggling and saying “I’m just kidding, my birthday is August 3rd.” Why the crap has she been lying to me for so long? If she’s lied about that, what else has she lied about..?