Of course, actually calling this historic moment is a crapshoot, and we'll have to continue to wait a while longer, which is OK too. I'm still enjoying following the daily progress of collapse, which is really a process and not something you can really pin to a single day, or even year, although sometimes with enough historical perspective later it can be narrowed down a bit. Still, after more than 1500 years, pinning the Collapse of the Roman Empire to 476 AD with the fall of Rome in the Western half of the Empire doesn't really identify when the collapse began, or when it ended. In some ways it's still with us in the deepest records of property ownership held in bank vaults in Switzerland and the catacombs of the Vatican by the Holy Roman Catholic Church.
For Industrial Civilization, collapse has been underway for a long time and in the FSoA you could point to a few moments as significant mileposts, the financial crisis of 2007-8, the collapse of the WTC on 911, the victory of consumerism and greed over the rebellion against capitalism and the back to the land movement of the hippies, best signified by the end of the 60s at Woodstock in the summer of '69, to name a few significant and symbolic events. So even if Black Tuesday is a major milestone this year, it's unlikely all the lights will go dark the next day or the dollar's exchange value will fall to zero either. Whatever happens, the trajectory is clear andthe pace of collapse is accelerating. The end of the age of oil is on the horizon, and the sun is setting on capitalism, globalism and the control of the many by a tiny fraction of greedy billionaires pulling the strings of politicians and legislators and judges they own is coming to an end. What follows will not be pretty, as nation states dissolve into anarchy, food becomes scarce and the vast majority of the current population die of starvation.
However, in the immortal words of Uncle Joe Stalin, you can't make an omelet without breaking a few eggs. :)

https://www.marketwatch.com/story/corporate-defaults-are-happening-at-fastest-pace-since-financial-crisis-according-to-s-p-a2a096a6
Corporate defaults are happening at fastest pace since financial crisis, according to S&P