The greatest moment of national prestige I've experienced was Bong Joon-ho's Parasite

‌It was when it won the Oscar for Best Picture.
Since it was such an unprecedented event, I was checking the news in real-time.
It was the first time in my life I saw major international media outlets like CNN, the New York Times, and AP News featuring it so prominently in their headlines.
If it had just been Best Picture, it might not have become such a huge issue, but I think the fact that it was the first foreign-language film to win Best Picture in Oscar history had an incredibly powerful impact.