The Java demo mode lasts just five in-game days, which translates to about 100 minutes in real time. For about an hour and a half, you can try out the Minecraft demo, but then it will be out.

How to use the Game Mode switcher In 2020, Mojang added a new way to switch game modes for Java Edition players. 1. Press and hold F3. 2. While holding down F3, tap (and release) F4. A new menu ...