Absolutely! The recommended time for freezing butter is 6 months. I've never been able to keep butter on hand that long, so I haven't seen first hand what the result looks like. Roisin Hennerty, Vice President of Kerrygold, says that because home freezers are opened and closed so often, she recommends using your butter within three months.
For more information on storing foods in the freezer, see our Fill-Up-Your-Freezer Storage Guide.