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kdmccormick | 1 year ago

What? No. When you are 0, it is your first year. When you are 21, you have begun your 22nd year. In the US you are legal to drink in your 22nd year of life.

You are correct that nobody says "22nd year" in this context, but nobody says "21st year" either. The former is awkward but the latter is just incorrect.

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Terretta|1 year ago

> nobody says "21st year" either

On the contrary, enough people say it, it's a quora question:

https://www.quora.com/What-does-it-mean-to-be-in-your-twenty...

Authors love phrases like this. Which, in turn, comes from another ordinal/cardinal confusion stemming back to common law:

"A person who has completed the eighteenth year of age has reached majority; below this age, a person is a minor."

That means they completed being 17, but that's just too confusing, so people think you stop being a minor in your 18th year.

bregma|1 year ago

It's just not true. You've completed being 17 years old on your 18th birthday, when you enter your 19th year and can count 18 years under your belt.

Consider a newborn. As soon as they're squeezed out they are in their first year of life. That continues until the first anniversary of their decanting, at which point they are one year old and enter their second year of life.

There is nobody, nobody, who refers to a baby as being in their zeroth year of life. Nor would they refer to a one-year-old as still being in their first year of life as if they failed a grade and are being held back.

The pattern continues for other countable things. Breakfast is not widely considered the zeroth meal of the day. Neil Armstrong has never been considered the zeroth man on the moon nor is Buzz Aldrin the first. The gold medal in the Olympics is not awarded for coming in zeroth place.

antonvs|1 year ago

The top response in your Quora link is that your 21st year "means you’re 20. You have had your 20th birthday, but not yet your 21st." That is the conventional definition.

People commonly make the mistake of thinking otherwise, but that's all it is. A mistake.