if I was getting into unfunny standup, I'd start with this

Does this ever happen to you? I keep thinking it's 2007, but at the same time I STILL often start writing dates with '19...' - well, it's a thousand year habit, you can't just break it in seven years. I mean 6.

I was looking at some kindergartens in Altona during the week and a couple had murals celebrating 40 years. I took this to mean they were established in the 50s. The next day I figured it out.