[License-discuss] Becoming Public Domain After X Years

[David Woolley]

On 22/11/2019 21:01, Martin L via License-discuss wrote:
> I was wondering if anyone had links/knowledge about licenses which,
> after X amount of time (say, 10 years), release the code into the public
> domain?

My understanding is that, even in the USA, it is an open question as to 
whether you can put something into the public domain before it would 
lapse into it, and, in most other countries it is definitely not 
possibly.  That's one reason for the existence of CC0.

Even where US federal government works are in the public domain in the 
USA, that is not true of the same works in other countries.