Christians have been saying that the end of the world is near since their main man, Jesus Christ, said it himself circa 2,000 years ago (Matthew 16:28).
It didn’t come true when he said, it hasn’t come true since any of the charlatans after him have said it, but it doesn’t stop them from saying the same thing over and over again. At this point Christians have predicted the end of the world so many times it’s a wonder any of them has any credibility left.