What century was the year 2000 in?

[The world will shine with light in our nightmare]

Somebody, either here or on AAD, remarked that a guy who reaches 30 technically isn't 'in' his thirties; he's just a guy in his twenties celebrating a birthday.

In the case of centuries, we don't have to make people feel younger than they are, so I count 2000 as part of the 21st century.

[The world will shine with light in our nightmare]

Somebody, either here or on AAD, remarked that a guy who reaches 30 technically isn't 'in' his thirties; he's just a guy in his twenties celebrating a birthday.

However, people do have a “0th birthday” (the day of their birth) and are 0 years old for the first year of their life.

Yeah, those birthdays usually suck though. Think about it: after spending nine months in the womb developing, playing, kicking, and receiving nourishment, you're thrust into this world crying. And cry you shall until you hit the grave.