Giving Birth to a Two Year Old?

It's my birthday so I thought I'd relate a personal story on the topic.

Not long after getting engaged, a discussion with some friends led to the shocking discovery that my fiance Jason was two, yes TWO, years younger than he said he was. How could that be? His answer: he was born two years old and didn't think anything of it.

Curiosity #1:
In China, you can almost give birth to a two year old. Here's how it works: You spend nine months in momma's belly, so when you're born you're technically already a year old. Many Chinese people, especially older people and those from the countryside like my husband, only celebrate their birthday during the Chinese New Year. So, if you're a winter baby like my hubbs and your birthday falls right before Chinese New Year, you can be celebrating your second birthday in the SAME week you were born.

Does that mean double the cake?