One year, even six months would seem more reasonable, but eventually all items turned in as lost should be able to be claimed by the finder. I guess I'm just surprised that 30 days is all it took. At least it's better than some places where they might just say "tough luck.
I can only speak for UK laws, but here the law states found items should be given to the nearest police station. If they are not claimed within three months, the preson who found it becomes the owner with a police certificate.
During that time police check serial numbers, etc against stolen lists. Especially on high value items.