The wacko environmentalists have never been shy about picking specific dates for stuff—here is a collection of some of them:
https://cei.org/blog/wrong-again-50-years-of-failed-eco-pocalyptic-predictions/
They count on the mass media not calling them out on their lunacy.
Yup. In my lifetime, the enviro-wackos have been wrong about the imminent end of the world as many times as the Rapturists have. The enviro-wackos are more dangerous in that, since they claim to base their predictions on “the science” they are taken seriously by influential people in the media and academia who are in a position to try and shove it down our throats and brainwash our children who are captive audiences in our public schools.