If they're sprouting now, I'd suggest potting them up and growing them on indoors, preferably a sunny windowsill as cool as is available. You can snip bits of greens from them after a while, and then if you want to plant them in the garden this spring you can (you may not get a good enough head for eating, but you can still replant whatever little cloves there are to grow on proper garlic for the following year!)
I wouldn't wait til spring to plant them, if you can avoid it, as they're going to be awfully tired and out of reserves by then, and not grow very well nor produce much at *all* in the way of new cloves.
Have fun,
Pat