Dad Joke CCCV

It's been a month since my last Dad Joke, where I promised to do better (after a month long joke hiatus).  The Spirit is willing, but the Flesh is weak ...

But Tuna left a comment to that post with a new Dad Joke!  Reproduced here in full:

Good God, it's been a month since this month late dad joke!

Here's one: Do you want a brief explanation of an acorn?
In a nutshell, it's an Oak tree.

Thanks, Tuna!