In The Netherlands, we have Remembrance Day (we call it "dodenherdenking" = "remembrance of the dead") on the 4th of May, and Liberation Day is celebrated one day later.
My paternal grandfather was liberated from a German camp by the Russians, so the photo is appreciated. Also, many thanks to both your grandfathers. Which theatre were they in?
I don't know exactly where they served as in which battles. I was raised by one of them but he passed away before I got to be old enough to really get what he was telling me. The other one died way before my time.
If you want to know: there are ways to find out; it's in the archives somewhere.
I'd have to speak to the family to find out what they know. That may be possible but will take quite a few hours of pre-drinking.