Frozen breast milk

I have an abundance of frozen breast milk I pumped and saved for emergencies but never really needed. I’m going to keep the newer stuff for an emergency supply and oatmeal, etc. but is there anything I can do with my frozen breast milk that’s older than 6 months? (It’s been kept in my side by side freezer, I don’t have a deep freezer). Or do I have to throw it away? Looking into donation but I don’t think they’ll even accept my newer stuff (by now most of its 2-3 months old).