In the beginning of the 19th century and the beginning 20th century and the beginning of the 21st century.
Those you were miss led by a contrary spirit predicted that the LAST DAYS were upon them.
The Bible contains tons of descriptions of the last days, of the beast system that will drive it, of particular players like Antichrist and False Prophet, of specific nations that will be involved in specific ways. And, always in the center of it, are God's covenant people.
I've noticed that people who have predicted the last days in times past have done that detached from events happening in the world at the time. They more seem to depend on a counting strategy like the man who predicted a specific date and put it on billboards. I think the reason the book of Daniel is sealed until the end is because it will simply not be understandable until the set up is in place for certain events to unfold.
Given that, I don't think you can go wrong by paying attention to what is going on in the world and looking at how it relates to Bible prophecy. What I think we have to remember is that it is not only one event but many simultaneous and consecutive events that will exhibit the birth pangs of the LAST DAYS.
As ww says, we are looking for a pattern--and one that fits the template given to us in the Bible.