How long can you keep pumpkin pie you baked on Thanksgiving?
You can keep pumpkin pie in the refrigerator for over a week and it's still good to eat. It does taste the freshest the first couple of days after baking. Keep it well covered so it doesn't absorb any of the other odors in the refrigerator.
Keep it till it smells or tastes gross.
Vacuum seal it and freeze it
I can't keep it more than a few days. That probably explains the weight problem.