InkOctober - the new name for October! And it's better, because it's more inky. And we love ink, because we love pens, and without ink, pens are just hollow tubes, with at least one end partially blocked so you couldn't even use them as drinking straws. Much better with ink.
With ink, you can use them to draw things, doodle, sketch, write prose and poetry, and all sorts of other things. You could take your inkspiration from the official InkOctober prompts, or make up your own. Just spread a bit of ink about!