The latest "confirmed" Doomsday date on that page references a quote that doesn't contain a Doomsday date, so the site owner has wilfully misread the quote to create one.

That list appears to be cherry picked to support a narrative.

It doesn't include e.g. Exxon's predictions: https://www.theguardian.com/business/2023/jan/12/exxon-clima...

As a climate change skeptic

I want a curated list of failed or vague climate predictions

So I can maintain cognitive resonance.

What would convince you?

Do tell. What part of it are you skeptical about? That the greenhouse effect is real? That temperatures are rising? That extreme weather events will continue to increase in frequency and severity? That raising temperatures are melting the tundra and releasing more methane causes a feedback loop? That ice sheets are receding all over the world?

These all seem to be well supported by facts. I’m curious about what the seed of your skepticism is, what planted it what previously cherished beliefs it supports.

I thought this was quite a good interview, summing the rational, skeptic position.

https://youtu.be/l90FpjPGLBE?si=v8fwGFWT-yLPpKgC

This site is pretty bad. Every prediction is a "doomsday" prediction, and it simply marks them as wrong if the world hasn't ended by the specified date. Example, predicting the Hoover damn (Lake Mead) won't provide electricity if no action is taken. There have been significant efforts at water conservation. So now it's a "missed" prediction. Or predictions that X could happen in as little as Y years, establishing a lower bound. Y years passed, we'll call it missed.

It would be interesting to see a meta-analysis of predictions and how accurate they turned out to be, but that isn't what this site is.