For best results, frozen cheesecake should be used within a month of freezing. But, if you're okay with a slight texture change, you can freeze cheesecake for up to two months as well.

Does freezing cheesecake ruin it?

Most sources say after one month in the freezer, cheesecake begins to lose its quality. I've had well-wrapped cheesecakes frozen for as long as two months with no problems, but any longer than that is tempting fate.

Why shouldnt you freeze cheesecake?

Cheesecake freezes pretty much solid, and it's very difficult (or even impossible) to slice it while frozen. If you need individual slices, you need to cut up the cake before freezing.