logoalt Hacker News

usrnm • today at 10:37 AM • 2 replies • view on HN

You're contradicting yourself, how can it be unique if only 1000 can be assigned per given date of birth? What if more than one thousand babies are born in the country one day?


Replies

piva00 • today at 10:39 AM

It's Denmark, it won't have 1k babies born the same day.

It's the same in Sweden: YYYY-MM-DD-XXXX is the format for a personnummer, double the population of Denmark and there are no collisions.

➕ show 4 replies
tannertech • today at 10:39 AM

That's a problem for future Denmark!