http://www.bbc.co.uk/news/science-environment-13452711An Amazonian tribe has no abstract concept of time, say researchers.
The Amondawa language has no word for "time", or indeed of time periods such as "month" or "year".
The people do not refer to their ages, but rather assume different names in different stages of their lives or as they achieve different status within the community.
What a good idea. You can call me "old fart."