This movie was from around I saw in 2004 or 2005 (English/Hollywood).
There was a main protagonist, although I can't remember what he looked like.
But there was this other lady (single parent) she had a kid (or two). She toke him/them to a farm, where it is kind of a zoo but only buffaloes are there to see. It was not a fancy place for tourists.
When they arrived, they were the only customers or visitors there. A man had opened the door for them and he explained that there is a fee for entrance. The lady did not have any money (or maybe she couldn't afford to spend money on a zoo), so she started to apologies to her children.
The man who opened the gate for them overheard her apologizing to her children, and said something like "But today is Monday, so it is free of charge".
The movie is not about the zoo, and not about the man who let them in without money. But this scene stuck to my memory and I really admired how it was written.