I was teaching about doomsday predictions about a week ago. I used global predictions of disaster to set up my talk about panic over running out of resources. As specific examples, I used the Family Radio prediction about the end of the world in May of 2011 and the timely Mayan Calendar example. I also mentioned the Y2K thing and almost none of my students knew what that was. I had to explain that people freaked out about 12-31-99 rolling over to 1-1-00 would throw off computers and how early computer programmers didn't have the space to put 12-31-1999.
I guess most of my students were 6 when this happened. I feel like it's a relatively current event, but I didn't think about my audience enough when using that example.