There is a community who live deep in the Amazonian rainforest of Brazil who have no calendars or concept of time like we do.They follow the patterns of day and night and the dry and rainy seasons.They also have no age.They mark the transition from childhood to adulthood to old age by changing their name.Little children give their names to newborn siblings and get a new name.
"It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt." Abraham Lincoln. (Not the most inspiring quote but it makes me smile.)