I was told the Chinese count one year of age from the moment of birth because they count one year of gestation.
Is that really so?
I recently learned that Hungarians count their age in a way similar to this Chinese traditional usage, but they do so because they consider that the first year of a person starts with birth. So that from the moment a baby is born, it is already on its first year. After the first year, that is, after his first birthday celebration, the second year starts. And so on.
The European century counting follows a similar reasoning. If we counted centuries the way we (non-Chinese) count life years, we would be in the 20th century, not the 21th.
What is the reason about the traditional Chinese way of life year counting ? Is it still used? When did it start?
