Sorry, I didn't mean that what I said was the origin, only that was what it was marketed as around that period, and I should clarify my context that I was talking about what it was like in Canada, where it has only relatively recently become a thing. I guess what I meant to refer to was its etymological shift from the "selling excess stock" narrative in America (which itself was just a rebranding of the previous meaning) towards becoming a global event of consumption for consumption's sake in itself.
Maybe I am wrong, but I feel like it has only been within the past couple decades that we have seen things marketed as black Friday outside of America, or sales co-opting the name for things like pre-black Friday sales, extended black friday sales and things like black Friday in summer.