Is it safe to freeze ground beef one day before its expiration date?
It's fine to freeze, no need to cook if you don't want to; just be sure to use it immediately after thawing.

Freezing things essentially stops the clock: food will stay just as safe to eat no matter how long it's frozen. It can deteriorate but it's more about drying out (freezer burn), taking on odors, and so on, not safety. So since it's safe right now, it'll be safe frozen.