Yes I have had many over the years but never dates or time periods revealed.
I have dreamt mainly of Tsunamis, volcanoes and most recently comets/asteroids, my last one being about 6 months ago. They were all very vivid and stayed with me.
I "died" in 3 of them but I am never scared. Stuff is going to happen, I can feel it, as to when, who knows, it's anyone's guess. I think the point is to be prepared mentally and yes having some prepping to fall on is also a good idea.
When the event happens, it will be sudden, I don't buy into all this fear mongering, what will be will be. I am not wishing for "doom" however change is inevitable in a world that has lost it's way, I want change for the better and I don't see any other way, people just won't face how far we have fallen. We need a wake up call and it's going to be an event that no one can hide from.
Finally just my humble opinion, it's close, I make that statement based on my own feeling and the most important prepping is the internal kind.