Does Minecraft require any further online connectivity after initial login?

After initial account creation and first log in - does Minecraft ever require further logging in or can it be then just played offline / with offline servers without WAN connectivity? I'm concerned about some timeouts of login so lets say if I don't launch game for 2 years, do I need to log in again? (lets say I don't want to update if it matters)

I'm talking about legit copy of Minecraft Java edition.

Solution 1:

The only things that definitely require an internet connection are:

• Playing on a server
• Updating Java, the launcher or the game automatically
• Getting out of demo mode when playing for the first time

Note: I sometimes have issues where the login or that fact that the Minecraft version is already downloaded gets forgotten, but I don't know what causes it, I have pretty complicated setups. Usually it shouldn't happen.