Japanese important age thing?

Question:

I've read about how there are certain years that are considered especially hard or important. I was wondering what that was called.

Answer:

Some things are not clear.

Are you talking about year in our life? Or talking about year in history?

Addition:
Well, this year in every 60 years is seen as bad as birth year.
http://en.wikipedia.org/wiki/Bingwu

Important? 20 is important because you become an adult at 20 in Japan. Are you talking about this kind of thing?

Addition2:
It's not the entire Japan thing. Some fortune tellers may say some years are hard. But not everyone in Japan thinks that way.