I'd heard of Thanksgiving prior to coming to the US and sort of celebrated it in Puerto Rico (which, to be fair, is technically a part of the US). It was taught to me as more of a religious thing. A general day of being thankful to God for being alive and having good things/people in my life. There wasn't that much emphasis on pilgrims or the history of it. Nor on turkey. And we certainly celebrated it way more once we moved here.

Grenada is interesting, though not so surprising.