Have you ever realised you've pronounced something wrong your whole life?

I was listening to the radio before and I heard an announcer say the year 2012 as “two thousand twelve” without the “and”.

WTF? I know it’s a small thing, but then I googled it and pretty much everyone else says this too. Since the year 2001 I’ve been saying two thousand AND one.

Have I been wrong this whole time? How do you say it? Are there any other times you suddenly realised what you thought was the truth was a lie???

Stupid education.