I’ve heard 7 as lucky all my life in the US and it’s mentioned in the Wikipedia page for 7. I think if you asked the average English-speaking American to name a number thought of as lucky most people would say 7.
Lucky Seven/Lucky Number Seven is also just a common phrase in American culture. There’s even a Wikipedia page of things called Lucky [Number] Seven. https://en.m.wikipedia.org/wiki/Lucky_7
Lucky Seven/Lucky Number Seven is also just a common phrase in American culture. There’s even a Wikipedia page of things called Lucky [Number] Seven. https://en.m.wikipedia.org/wiki/Lucky_7