Looks like that date's about 800,000 years ago in Antarctica and about the early 1800's for the target date of the human-caused warming, but that's just based on CO2 levels.
Source
There's a lot more water vapor in the atmosphere within the last 100 years, too, and that's a bigger greenhouse gas than CO2 from what I've read.
Source
Source
Source
Source with graph - goes back to 1980s for the water vapor measurements with a pretty clear increase since that time.
Now, I understand there's a lot of science in there, and from "official" government channels and such, so all of it will be shoved under the rug with comments about, "...just what THEY want to you believe" and such. The one key characteristic of a good conspiracy theory is that it's infallible, no matter how much sciency stuff ya throw at it. Not to mention the fact that almost all my sources above are from the govnmt or NASA or other hated "they/them" institutions.
Hey, I just brought up a good point; conspiracy theory bad guys were the first non-binary folks, always being called "they/them"
. I crack me up sometimes.
Anywho, I don't just think or believe climate change is real and man-influenced and accelerated. I've read science from what I take as valid sources, and I know it's real. Others can believe whatever they want, and they still will, but it's like someone saying the Sun won't rise tomorrow. You can spend all night convincing others and "proving" the Sun won't come up over the horizon, but eventually it does because nature don't give two-sh*ts about conspiracies.
Ya'll stay safe.
Still looking for that magic date of your pre-global warming Golden Age.