I found a container of sour cream that’s been in my fridge since Shavuos.
Smells and looks fine.
Yes. Most containers state that it van be used up o one week after the expiration date. If it smells ok and not discolored its possible it is still good but I have my doubts. Based on my personal experiences.
Once it was opened it doesn’t last long. If it was completely closed it might be good. When in doubt I would discard it.
It might be sour