> You can not perform legal act (releasing) with extra conditions like a delay. Either you did it or not!
There are definitely fundamental legal questions in Open Source licenses that differ from country to country, but you're most likely incorrect that a delay cannot happen in Czechia. Delays in (non software) licenses are very common and have been held up in courts. In fact, that's the common case of many licenses that they hare different rights associated over time.
> For the same reason you can not put extra conditions in Last Will
I doubt that whatever regulates wills restricts contracts or licenses.
There are definitely fundamental legal questions in Open Source licenses that differ from country to country, but you're most likely incorrect that a delay cannot happen in Czechia. Delays in (non software) licenses are very common and have been held up in courts. In fact, that's the common case of many licenses that they hare different rights associated over time.
> For the same reason you can not put extra conditions in Last Will
I doubt that whatever regulates wills restricts contracts or licenses.