We can set the shut-off days in Server Settings. The info text suggests that the shut-off occurs after exactly the given amount of days. However, is it possible to make it more unpredictable? Like setting the shut-off to happen at an unknown time between some min-max days, similar to what can be done in single-player setup.

By default, there's no way to make it random.

But . . .

I suppose, becuase this is technically a Lua file, you could write a call to ZombRand to get a random date, e.g. ZombRand(365) should return a number between 0 and 365.

I really don't know if this'd work, and it probably wouldn't be consistent: every time you restart the server, the number would change.

:) I'll try that. No need for consistency, it's supposed to be random after all.

It'll just be weird if the water shuts off, then comes back on the next time you start the server, then off again.